placing a lot messed up my game

[foorcr]

i've tried to place a lot in my world (some film studio with some.. questionable data, the size for the lot was 999x999, but was placeable ona 64x64 lot) and since then my whole game is fucked up. it didnt place the lot at all, if i try to play a family or edit a lot i just get booted back to the world screen. i already validated my game files, which only triggert a "displayname field missing from registry" error upon starting the game, which i got under control by reinstalling. 

it works fine without my mods or tray folder, but i'd hate to lose all that stuff, so i'm just shooting my shot in hopes someone else already dealt with something like that. anybody got some ideas?