NetBeansPortable Windows 7 JRE issue

Hello,
I downloaded Groovedown app, which is Java JAR folder with some .exe launcher. I guess the .exe launcher just pass JAR url to jvm or something like that. Problem is that when I launch it, it tells me this:

[Title: Java Virtual Machine Launcher]
Error: could not open
'G:\NetBeansPortable\App\jdk\jre7\lib\i386\jvm.cfg'

I have Netbeans, Eclipse, all development stuff and of course java too in my computer now, but I had once NetBeansPortable on flash drive in my computer, so I guess it somehow overrided some Windows setting. I would like to get rid of it, but I cant find a way. I checked java control panel, environmental variables, but I didn't find anything that could solve this.

Anyone have an idea, how to undo this?

Any help is appreciated, thanks.