diff --git a/tools/cooja/config/external_tools.config b/tools/cooja/config/external_tools.config
new file mode 100755
index 000000000..53798041d
--- /dev/null
+++ b/tools/cooja/config/external_tools.config
@@ -0,0 +1,44 @@
+PATH_CONTIKI = ../../..
+PATH_COOJA_CORE_RELATIVE = /platform/cooja
+PATH_MAKE = make
+PATH_LINKER = ld
+PATH_AR = ar
+PATH_SHELL = sh
+PATH_C_COMPILER = gcc
+PATH_OBJDUMP=objdump
+PATH_OBJCOPY=objcopy
+OBJDUMP_ARGS=-h
+CMD_GREP_PROCESSES = grep "^PROCESS_THREAD[ ]*([^,]*,[^,]*,[^)]*)" -o -H
+REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD[ ]*\\(([^,]*),[^,]*,[^)]*\\)
+CMD_GREP_INTERFACES = grep "^SIM_INTERFACE([^,]*," -o -d skip -D skip -H -r
+REGEXP_PARSE_INTERFACES = ([^/]*.c):SIM_INTERFACE\\(([^,]*),
+CMD_GREP_SENSORS = grep "^SENSORS_SENSOR([^,]*," -o -d skip -D skip -H -r
+REGEXP_PARSE_SENSORS = ([^/]*.c):SENSORS_SENSOR\\(([^,]*),
+COMPILER_ARGS = -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -fno-builtin-printf
+LINK_COMMAND_1 = gcc -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -shared -Wl,-Map=$(MAPFILE) -o $(LIBFILE)
+LINK_COMMAND_2 =
+AR_COMMAND_1 = ar rcf $(ARFILE)
+AR_COMMAND_2 = 
+CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
+CORECOMM_TEMPLATE_FILENAME = corecomm_template.java
+PATH_JAVAC = javac
+DEFAULT_PROJECTDIRS = [CONTIKI_DIR]/tools/cooja/apps/mrm;[CONTIKI_DIR]/tools/cooja/apps/mspsim;[CONTIKI_DIR]/tools/cooja/apps/avrora;[CONTIKI_DIR]/tools/cooja/apps/serial_socket;[CONTIKI_DIR]/tools/cooja/apps/collect-view;[CONTIKI_DIR]/tools/cooja/apps/powertracker
+
+PARSE_WITH_COMMAND=false
+PARSE_COMMAND=nm -a $(LIBFILE)
+MAPFILE_DATA_START = ^.data[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
+MAPFILE_DATA_SIZE = ^.data[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
+MAPFILE_BSS_START = ^.bss[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
+MAPFILE_BSS_SIZE = ^.bss[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
+MAPFILE_VAR_NAME = ^[ \t]*(0x[0-9A-Fa-f]*)[ \t]*([^ ]*)[ \t]*$
+MAPFILE_VAR_ADDRESS_1 = ^[ \t]*0x([0-9A-Fa-f]*)[ \t]*
+MAPFILE_VAR_ADDRESS_2 = [ \t]*$
+MAPFILE_VAR_SIZE_1 = ^
+MAPFILE_VAR_SIZE_2 = [ \t]*(0x[0-9A-Fa-f]*)[ \t]*[^ ]*[ \t]*$
+COMMAND_VAR_NAME_ADDRESS = ^([0-9A-Fa-f][0-9A-Fa-f]*)[ \t][^Tt][ \t]([^ ._][^ ]*)
+COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]d[ \t].data$
+COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_edata$
+COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]A[ \t]__bss_start$
+COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_end$
+
+VISUALIZER_DEFAULT_SKINS=se.sics.cooja.plugins.skins.IDVisualizerSkin;se.sics.cooja.plugins.skins.GridVisualizerSkin
diff --git a/tools/cooja/config/external_tools_freebsd.config b/tools/cooja/config/external_tools_freebsd.config
index 333b16cd4..2e14c3674 100644
--- a/tools/cooja/config/external_tools_freebsd.config
+++ b/tools/cooja/config/external_tools_freebsd.config
@@ -1,42 +1 @@
-PATH_CONTIKI = ../../..
-PATH_COOJA_CORE_RELATIVE = /platform/cooja
 PATH_MAKE = gmake
-PATH_LINKER = ld
-PATH_AR = ar
-PATH_SHELL = sh
-PATH_C_COMPILER = gcc
-PATH_OBJDUMP=objdump
-PATH_OBJCOPY=objcopy
-OBJDUMP_ARGS=-h
-CMD_GREP_PROCESSES = grep "^PROCESS_THREAD[ ]*([^,]*,[^,]*,[^)]*)" -o -H
-REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD[ ]*\\(([^,]*),[^,]*,[^)]*\\)
-CMD_GREP_INTERFACES = grep "^SIM_INTERFACE([^,]*," -o -d skip -D skip -H -r
-REGEXP_PARSE_INTERFACES = ([^/]*.c):SIM_INTERFACE\\(([^,]*),
-CMD_GREP_SENSORS = grep "^SENSORS_SENSOR([^,]*," -o -d skip -D skip -H -r
-REGEXP_PARSE_SENSORS = ([^/]*.c):SENSORS_SENSOR\\(([^,]*),
-COMPILER_ARGS = -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -fno-builtin-printf
-LINK_COMMAND_1 = gcc -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -shared -Wl,-Map=$(MAPFILE) -o $(LIBFILE)
-LINK_COMMAND_2 =
-AR_COMMAND_1 = ar rcf $(ARFILE)
-AR_COMMAND_2 = 
-CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
-CORECOMM_TEMPLATE_FILENAME = corecomm_template.java
-PATH_JAVAC = javac
-DEFAULT_PROJECTDIRS = [CONTIKI_DIR]/tools/cooja/apps/mrm;[CONTIKI_DIR]/tools/cooja/apps/mspsim;[CONTIKI_DIR]/tools/cooja/apps/avrora;[CONTIKI_DIR]/tools/cooja/apps/serial_socket;[CONTIKI_DIR]/tools/cooja/apps/collect-view;[CONTIKI_DIR]/tools/cooja/apps/powertracker
-
-PARSE_WITH_COMMAND=false
-PARSE_COMMAND=nm -a $(LIBFILE)
-MAPFILE_DATA_START = ^.data[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_DATA_SIZE = ^.data[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_BSS_START = ^.bss[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_BSS_SIZE = ^.bss[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_VAR_NAME = ^[ \t]*(0x[0-9A-Fa-f]*)[ \t]*([^ ]*)[ \t]*$
-MAPFILE_VAR_ADDRESS_1 = ^[ \t]*0x([0-9A-Fa-f]*)[ \t]*
-MAPFILE_VAR_ADDRESS_2 = [ \t]*$
-MAPFILE_VAR_SIZE_1 = ^
-MAPFILE_VAR_SIZE_2 = [ \t]*(0x[0-9A-Fa-f]*)[ \t]*[^ ]*[ \t]*$
-COMMAND_VAR_NAME_ADDRESS = ^([0-9A-Fa-f][0-9A-Fa-f]*)[ \t][^Tt][ \t]([^ ._][^ ]*)
-COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]d[ \t].data$
-COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_edata$
-COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]A[ \t]__bss_start$
-COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_end$
diff --git a/tools/cooja/config/external_tools_linux.config b/tools/cooja/config/external_tools_linux.config
index 53798041d..e69de29bb 100644
--- a/tools/cooja/config/external_tools_linux.config
+++ b/tools/cooja/config/external_tools_linux.config
@@ -1,44 +0,0 @@
-PATH_CONTIKI = ../../..
-PATH_COOJA_CORE_RELATIVE = /platform/cooja
-PATH_MAKE = make
-PATH_LINKER = ld
-PATH_AR = ar
-PATH_SHELL = sh
-PATH_C_COMPILER = gcc
-PATH_OBJDUMP=objdump
-PATH_OBJCOPY=objcopy
-OBJDUMP_ARGS=-h
-CMD_GREP_PROCESSES = grep "^PROCESS_THREAD[ ]*([^,]*,[^,]*,[^)]*)" -o -H
-REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD[ ]*\\(([^,]*),[^,]*,[^)]*\\)
-CMD_GREP_INTERFACES = grep "^SIM_INTERFACE([^,]*," -o -d skip -D skip -H -r
-REGEXP_PARSE_INTERFACES = ([^/]*.c):SIM_INTERFACE\\(([^,]*),
-CMD_GREP_SENSORS = grep "^SENSORS_SENSOR([^,]*," -o -d skip -D skip -H -r
-REGEXP_PARSE_SENSORS = ([^/]*.c):SENSORS_SENSOR\\(([^,]*),
-COMPILER_ARGS = -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -fno-builtin-printf
-LINK_COMMAND_1 = gcc -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -shared -Wl,-Map=$(MAPFILE) -o $(LIBFILE)
-LINK_COMMAND_2 =
-AR_COMMAND_1 = ar rcf $(ARFILE)
-AR_COMMAND_2 = 
-CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
-CORECOMM_TEMPLATE_FILENAME = corecomm_template.java
-PATH_JAVAC = javac
-DEFAULT_PROJECTDIRS = [CONTIKI_DIR]/tools/cooja/apps/mrm;[CONTIKI_DIR]/tools/cooja/apps/mspsim;[CONTIKI_DIR]/tools/cooja/apps/avrora;[CONTIKI_DIR]/tools/cooja/apps/serial_socket;[CONTIKI_DIR]/tools/cooja/apps/collect-view;[CONTIKI_DIR]/tools/cooja/apps/powertracker
-
-PARSE_WITH_COMMAND=false
-PARSE_COMMAND=nm -a $(LIBFILE)
-MAPFILE_DATA_START = ^.data[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_DATA_SIZE = ^.data[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_BSS_START = ^.bss[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_BSS_SIZE = ^.bss[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_VAR_NAME = ^[ \t]*(0x[0-9A-Fa-f]*)[ \t]*([^ ]*)[ \t]*$
-MAPFILE_VAR_ADDRESS_1 = ^[ \t]*0x([0-9A-Fa-f]*)[ \t]*
-MAPFILE_VAR_ADDRESS_2 = [ \t]*$
-MAPFILE_VAR_SIZE_1 = ^
-MAPFILE_VAR_SIZE_2 = [ \t]*(0x[0-9A-Fa-f]*)[ \t]*[^ ]*[ \t]*$
-COMMAND_VAR_NAME_ADDRESS = ^([0-9A-Fa-f][0-9A-Fa-f]*)[ \t][^Tt][ \t]([^ ._][^ ]*)
-COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]d[ \t].data$
-COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_edata$
-COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]A[ \t]__bss_start$
-COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_end$
-
-VISUALIZER_DEFAULT_SKINS=se.sics.cooja.plugins.skins.IDVisualizerSkin;se.sics.cooja.plugins.skins.GridVisualizerSkin
diff --git a/tools/cooja/config/external_tools_linux_64.config b/tools/cooja/config/external_tools_linux_64.config
index 2d238b504..6d4ac9eee 100644
--- a/tools/cooja/config/external_tools_linux_64.config
+++ b/tools/cooja/config/external_tools_linux_64.config
@@ -1,42 +1 @@
-PATH_CONTIKI = ../../..
-PATH_COOJA_CORE_RELATIVE = /platform/cooja
-PATH_MAKE = make
-PATH_LINKER = ld
-PATH_AR = ar
-PATH_SHELL = sh
-PATH_C_COMPILER = gcc
-PATH_OBJDUMP=objdump
-PATH_OBJCOPY=objcopy
-OBJDUMP_ARGS=-h
-CMD_GREP_PROCESSES = grep "^PROCESS_THREAD[ ]*([^,]*,[^,]*,[^)]*)" -o -H
-REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD[ ]*\\(([^,]*),[^,]*,[^)]*\\)
-CMD_GREP_INTERFACES = grep "^SIM_INTERFACE([^,]*," -o -d skip -D skip -H -r
-REGEXP_PARSE_INTERFACES = ([^/]*.c):SIM_INTERFACE\\(([^,]*),
-CMD_GREP_SENSORS = grep "^SENSORS_SENSOR([^,]*," -o -d skip -D skip -H -r
-REGEXP_PARSE_SENSORS = ([^/]*.c):SENSORS_SENSOR\\(([^,]*),
 COMPILER_ARGS = -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -fno-builtin-printf -fPIC
-LINK_COMMAND_1 = gcc -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/linux' -shared -Wl,-Map=$(MAPFILE) -o $(LIBFILE)
-LINK_COMMAND_2 =
-AR_COMMAND_1 = ar rcf $(ARFILE)
-AR_COMMAND_2 = 
-CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
-CORECOMM_TEMPLATE_FILENAME = corecomm_template.java
-PATH_JAVAC = javac
-DEFAULT_PROJECTDIRS = [CONTIKI_DIR]/tools/cooja/apps/mrm;[CONTIKI_DIR]/tools/cooja/apps/mspsim;[CONTIKI_DIR]/tools/cooja/apps/avrora;[CONTIKI_DIR]/tools/cooja/apps/serial_socket;[CONTIKI_DIR]/tools/cooja/apps/collect-view;[CONTIKI_DIR]/tools/cooja/apps/powertracker
-
-PARSE_WITH_COMMAND=false
-PARSE_COMMAND=nm -a $(LIBFILE)
-MAPFILE_DATA_START = ^.data[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_DATA_SIZE = ^.data[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_BSS_START = ^.bss[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_BSS_SIZE = ^.bss[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_VAR_NAME = ^[ \t]*(0x[0-9A-Fa-f]*)[ \t]*([^ ]*)[ \t]*$
-MAPFILE_VAR_ADDRESS_1 = ^[ \t]*0x([0-9A-Fa-f]*)[ \t]*
-MAPFILE_VAR_ADDRESS_2 = [ \t]*$
-MAPFILE_VAR_SIZE_1 = ^
-MAPFILE_VAR_SIZE_2 = [ \t]*(0x[0-9A-Fa-f]*)[ \t]*[^ ]*[ \t]*$
-COMMAND_VAR_NAME_ADDRESS = ^([0-9A-Fa-f][0-9A-Fa-f]*)[ \t][^Tt][ \t]([^ ._][^ ]*)
-COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]d[ \t].data$
-COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_edata$
-COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]A[ \t]__bss_start$
-COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_end$
diff --git a/tools/cooja/config/external_tools_macosx.config b/tools/cooja/config/external_tools_macosx.config
index 45efce1d1..e0c708e8e 100644
--- a/tools/cooja/config/external_tools_macosx.config
+++ b/tools/cooja/config/external_tools_macosx.config
@@ -1,5 +1,3 @@
-PATH_CONTIKI = ../../..
-PATH_COOJA_CORE_RELATIVE = /platform/cooja
 PATH_MAKE = make
 PATH_LINKER = gcc
 PATH_AR = ar
@@ -19,10 +17,7 @@ LINK_COMMAND_1 = gcc -dynamiclib -fno-common -o $(LIBFILE)
 LINK_COMMAND_2 = -framework JavaVM -Wl,-map,$(MAPFILE)
 AR_COMMAND_1 = ar rc $(ARFILE)
 AR_COMMAND_2 = 
-CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
-CORECOMM_TEMPLATE_FILENAME = corecomm_template.java
 PATH_JAVAC = javac
-DEFAULT_PROJECTDIRS = [CONTIKI_DIR]/tools/cooja/apps/mrm;[CONTIKI_DIR]/tools/cooja/apps/mspsim;[CONTIKI_DIR]/tools/cooja/apps/avrora;[CONTIKI_DIR]/tools/cooja/apps/serial_socket;[CONTIKI_DIR]/tools/cooja/apps/collect-view;[CONTIKI_DIR]/tools/cooja/apps/powertracker
 
 PARSE_WITH_COMMAND = true
 PARSE_COMMAND = /opt/contiki-2.x/tools/cooja/examples/jni_test/mac_users/nmandsize $(LIBFILE)
diff --git a/tools/cooja/config/external_tools_win32.config b/tools/cooja/config/external_tools_win32.config
index 236c5cffb..484f95a21 100644
--- a/tools/cooja/config/external_tools_win32.config
+++ b/tools/cooja/config/external_tools_win32.config
@@ -1,44 +1,13 @@
-PATH_CONTIKI = ../../..
-PATH_COOJA_CORE_RELATIVE = /platform/cooja
-PATH_MAKE = make
-PATH_LINKER = ld
-PATH_AR=ar
-PATH_SHELL = sh
 PATH_C_COMPILER=mingw32-gcc
-PATH_OBJDUMP=objdump
-PATH_OBJCOPY=objcopy
-OBJDUMP_ARGS=-h
 CMD_GREP_PROCESSES = grep '^PROCESS_THREAD[ ]*([^,]*,[^,]*,[^)]*)' -o -d skip -D skip -H -r
-REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD[ ]*\\(([^,]*),[^,]*,[^)]*\\)
 CMD_GREP_INTERFACES = grep '^SIM_INTERFACE([^,]*,' -o -d skip -D skip -H -r
-REGEXP_PARSE_INTERFACES = ([^/]*.c):SIM_INTERFACE\\(([^,]*),
 CMD_GREP_SENSORS = grep '^SENSORS_SENSOR([^,]*,' -o -d skip -D skip -H -r
-REGEXP_PARSE_SENSORS = ([^/]*.c):SENSORS_SENSOR\\(([^,]*),
 COMPILER_ARGS=-D__int64\="long long" -Wall -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/win32' -fno-builtin-printf
 LINK_COMMAND_1 = mingw32-gcc -shared -Wl,-Map=$(MAPFILE) -Wl,--add-stdcall-alias -o $(LIBFILE)
 LINK_COMMAND_2 = -L/usr/lib/mingw
-AR_COMMAND_1 = ar rcf $(ARFILE)
-AR_COMMAND_2 = 
-CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
-CORECOMM_TEMPLATE_FILENAME = corecomm_template.java
-PATH_JAVAC = javac
-DEFAULT_PROJECTDIRS = [CONTIKI_DIR]/tools/cooja/apps/mrm;[CONTIKI_DIR]/tools/cooja/apps/mspsim;[CONTIKI_DIR]/tools/cooja/apps/avrora;[CONTIKI_DIR]/tools/cooja/apps/serial_socket;[CONTIKI_DIR]/tools/cooja/apps/collect-view;[CONTIKI_DIR]/tools/cooja/apps/powertracker
-
 PARSE_WITH_COMMAND = true
 PARSE_COMMAND=nm -n -C $(LIBFILE)
-MAPFILE_DATA_START = ^.data[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_DATA_SIZE = ^.data[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_BSS_START = ^.bss[ \t]*0x([0-9A-Fa-f]*)[ \t]*0x[0-9A-Fa-f]*[ \t]*$
-MAPFILE_BSS_SIZE = ^.bss[ \t]*0x[0-9A-Fa-f]*[ \t]*0x([0-9A-Fa-f]*)[ \t]*$
-MAPFILE_VAR_NAME = ^[ \t]*(0x[0-9A-Fa-f]*)[ \t]*([^ ]*)[ \t]*$
-MAPFILE_VAR_ADDRESS_1 = ^[ \t]*0x([0-9A-Fa-f]*)[ \t]*
-MAPFILE_VAR_ADDRESS_2 = [ \t]*$
-MAPFILE_VAR_SIZE_1 = ^
-MAPFILE_VAR_SIZE_2 = [ \t]*(0x[0-9A-Fa-f]*)[ \t]*[^ ]*[ \t]*$
-COMMAND_VAR_NAME_ADDRESS = ^([0-9A-Fa-f][0-9A-Fa-f]*)[ \t][^Tt][ \t]([^ ._][^ ]*)
 COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]D[ \t].*_data_start__$
 COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]D[ \t].*_data_end__$
 COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]B[ \t].*_bss_start__$
 COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]B[ \t].*_bss_end__$
-
-VISUALIZER_DEFAULT_SKINS=se.sics.cooja.plugins.skins.IDVisualizerSkin;se.sics.cooja.plugins.skins.GridVisualizerSkin
diff --git a/tools/cooja/java/se/sics/cooja/GUI.java b/tools/cooja/java/se/sics/cooja/GUI.java
index c47460ae1..d525d5f61 100644
--- a/tools/cooja/java/se/sics/cooja/GUI.java
+++ b/tools/cooja/java/se/sics/cooja/GUI.java
@@ -156,6 +156,11 @@ public class GUI extends Observable {
   private static final long serialVersionUID = 1L;
   private static Logger logger = Logger.getLogger(GUI.class);
 
+  /**
+   * External tools configuration.
+   */
+  public static final String EXTERNAL_TOOLS_SETTINGS_FILENAME = "/external_tools.config";
+
   /**
    * External tools default Win32 settings filename.
    */
@@ -2762,7 +2767,7 @@ public class GUI extends Observable {
     }
 
     try {
-      InputStream in = GUI.class.getResourceAsStream(filename);
+      InputStream in = GUI.class.getResourceAsStream(EXTERNAL_TOOLS_SETTINGS_FILENAME);
       if (in == null) {
         throw new FileNotFoundException(filename + " not found");
       }
@@ -2770,6 +2775,13 @@ public class GUI extends Observable {
       settings.load(in);
       in.close();
 
+      in = GUI.class.getResourceAsStream(filename);
+      if (in == null) {
+        throw new FileNotFoundException(filename + " not found");
+      }
+      settings.load(in);
+      in.close();
+
       currentExternalToolsSettings = settings;
       defaultExternalToolsSettings = (Properties) currentExternalToolsSettings.clone();
       logger.info("External tools default settings: " + filename);