Well, first thank you for your reply; be sure that before to write I've already checked the FAQ and user manual, but so far nothing works.
I've installed and uninstalled the program several times, but without any success either.
when I ran cmd.exe, here's the message that I got:
I searched for the fıle library1.db, because it seems to be the reason of this issue, but there is not such a file.
So maybe there is a very simple explanation, but I am at lost.