Well, I decompiled all the .class files in Décafé (java decompiler :P) , and euhm, well, it is possible to get a valid regcode this way, but you really gotta be an experienced reverser, which I'm not.......so
for the java experts here......let yourself go

maybe i could manage on my own.....but not with this stupid shareware version of décafé, hehe.
it would be cool if you could decompile, change the source code your way, and recompile and insert the recompiled .class files back to the zip
i'm sure the full version of décafé supports it, or another good decompiler....(?)

greets

BlackB