AI5 won't load - stuck initializing VST 2x plugins


I made the mistake of fiddling with my Cubase AI5 plugins, and now it won’t load up. It spends ages (20 mins+) cycling through loads of files, most of which don’t seem to be anything to do with Cubase. Then I get a C runtime error R6034. Then it keeps going for a little while, then it gives up and crashes. I have tried re–installing the software this morning (and therefore losing ll my precious settings) and it has made no difference.

I really need some help here please.