What is the meaning of "Incompatible version number for class file format:"???
i had the absolute same issue… obviously, this tool is just too old for Y2k9 purposes?
what a pity :/
p.s.: tried to use it just with a simple call from the command line…
java -cp javaguard.jar;jakarta-oro-2.0.6.jar JavaGuard -i ./prototype/Level1Swing.jar -o ./output/Level1Swing-JGed.jar -l logfile.txt -v