Your database is probably screwed up - 1.5.0 ignored db errors and allowed you to continue using the software as normal, 1.6.x not so much.
Please use the PDF attached in the following post to manually correct your database files:
Your database is probably screwed up - 1.5.0 ignored db errors and allowed you to continue using the software as normal, 1.6.x not so much.
Please use the PDF attached in the following post to manually correct your database files: