So that explains why you waited forever to load your .bak1 file... probably because it's associated with Notepad ?
The bak1 and bak2 are associated to IDEal. If I double click them from windows explorer, IDEal loads, but the system is now 100% load on the processor, the HDD is loading infinitely and nothing happens. No source gets opened, and IDEal is running 100% on my cpu.