Restore default Java preferences


Dear sir or madam,

I have a java program, named tiny umbrella where it cannot save any preference I made in the program. when I try to change a pref it tells me AHHH CANNOT SAVE

As I tried to find its pref file I could not and so I think that there could be generic file that all java programs save its data. Do you know where this is in order to trash it and restore the save feature. (Oh and I have tested it on an other mac and there save correctly,