This conversation has been merged. Please reference the main conversation: Lightroom: Opening a catalog crashes Lightroom (Catalog is named with image file - e.g. IMG_2059.jpg.lrcat)
Then at each new start, LR crashes with the same error. Even holding down the Alt key does not work anymore - LR crashes before the catalog choice is displayed. Apparently LR tries every time to create a directory with the same name as the existing file, which fails and leads to a crash.
The only two ways to get LR working again is a) to delete (or edit) the preferences file in which the previously openened catalog is stored, or b) rename or delete the file that was selected before (and after starting and stopping LR, delete the most likely unwanted catalog directory which LR creates then).
Windows XP SP3 32 Bit, BTW: Same in LR 3.5RC.