Its getting stranger and stranger...
No need for the zip in the folder. The data.db is the file that the app is looking for.
Since it can't find nor create a database, maybe there is a problem with SQlite.
One thing you can try is to re-install the app but
after you have disabled any antivirus or anti-spyware or whatever might block some files from getting installed right.
I'm sorry I can't propose anything else, but I'm out of ideas..
