Recently I installed several Java apps through compiling Jar/Jad files.

However some of the apps I installed didnt work so well or wasn't very good.

I went to the Settings - Advanced Options - Application menu but there is no trace of the apps I installed! Where would I find the apps to erase?

From the Applications menu, click the menu key and select Modules. See if they are there!

Yup its there.

How do I erase those modules? With the menu key, there is no option for erasing, just editing permissions.