Cannot start ARDUINO, launch4j

It worked this morning but after I had added a library it didn't start any more.
I downloaded the latest version and the new beta-version but still have the same problem.
The splashscreen appears for a long tim > 1min and then a dialog with the text - "An error occured while starting the application". The dialog is titled "launch4j".

I've tried a lot of things, closed down the bluetooth for example.

The output of: "arduino.exe --l4j-debug is:

CmdLine:	E:\Arduino\arduino-1.0.5-r2\arduino.exe --l4j-debug
WOW64:		yes
Working dir:	E:\Arduino\arduino-1.0.5-r2\.
Bundled JRE:	java
Check launcher:	E:\Arduino\arduino-1.0.5-r2\java\bin\javaw.exe (OK)
Add classpath:	lib\pde.jar
Add classpath:	lib\core.jar
Add classpath:	lib\jna.jar
Add classpath:	lib\ecj.jar
Add classpath:	lib\RXTXcomm.jar
Launcher:	E:\Arduino\arduino-1.0.5-r2\java\bin\javaw.exe
Launcher args:	-Xms128m -Xmx128m -classpath "lib;E:\Arduino\arduino-1.0.5-r2\java\lib\tools.jar;lib\pde.jar;lib\core.jar;lib\jna.jar;lib\ecj.jar;lib\RXTXcomm.jar" processing.app.Base
Args length:	167/32768 chars

and if I run the latest version as arduin-debug.exe I'll get this:

        at processing.app.Base.addSketchesSubmenu(Base.java:1730)
        at processing.app.Base.addSketches(Base.java:1651)
        at processing.app.Base.addSketchesSubmenu(Base.java:1730)
        at processing.app.Base.addSketches(Base.java:1651)

The beginning of that log has dissappeared as it was too long.
What can I do next?

For me, running V1.0.3 (still), the problem went away when I removed a Blutooth device (mobile phone) which I had used several weeks earlier to upload some pics. Also, when I was getting the launch4j error message, if I just left things on the screen I eventually got the IDE window up.

Cheers,
Terry