Re: ME3: Game broke because of mods, please help!

From the Nexus mod page:
-----------------------
Uninstall:

Currently there are two ways to thoroughly uninstall the mod:  


The play it safe - If you backed up the vanilla files, you can simply delete the modded versions and replace with your backup and delete the bioengine.ini in the My Documents\Bioware\Config directory.

Ol' Faithful - Uninstall the game through windows program manager and delete the bioengine.ini in the My Documents\Bioware\Config directory.
-----------------------

Did you follow the mod author's instructions exactly for uninstalling?