Ok, i recently updated to 1.1.3 and have 2 systemextensions which i cant uninstall.. i get a "Mainscript BLAH"

Back in the Installer v2 days, i remember there was a .plist file inside the app which contained a list of the apps which are currently installed. Somehow i'm not able to find the file on v3...

Does anybody have a clue on where this file is stored now?