KoLmafia won't run

[Flugelhorn]

Hello. I've got a problem with running KoLmafia. I can run the old .exe vesion (20,7) however whenever I try to launch the newest .jar it simply creates 4 folders (images, relay, script and settings) and nothing more. No error message, no window opening and closing, nothing more. Notably in settings there is an empty GLOBAL_prefs.txt file. Thanks in advance.

EDIT: This is an error message from the console:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 1
at java.lang.String.charAt(Unknown Source)
at net.java.dev.spellcast.utilities.DataUtilities.toColor(DataUtilities.java:427)
at net.sourceforge.kolmafia.KoLmafia.initLookAndFeel(KoLmafia.java:519)
at net.sourceforge.kolmafia.KoLmafia.main(KoLmafia.java:370)

 

[philmasterplus]

Does your GLOBAL_prefs have this line:

innerTabColor=\#8ca9ff

or this?

innerTabColor=

If so, delete this line and try running KoLmafia again.

Also, what is your KoLmafia revision, OS and Java version?

 

[Flugelhorn]

Hey, the file was completely empty, however I managed to get it all running by accident when I ran it from desktop. It seems changing drive the app was located in solved this problem. Thanks for the help.