C: as a VST-folder = hang

Hi, I accidentally set C: as a vst-folder in Cubase SL2, which now scans every dll on my harddisk on startup and hangs halfway through … so I can not go in the program and undo this setting.
Does anybody know if there is a file that I can access via explorer somewhere with these settings maybe? (the vstplugins-paths)
I know I can open the cubase application data folder from the start menu but the vstpluginpaths are not stored there it seems …

Look to Trash Prefs in my sig.