Database wiped every few days

I'm having a recurring problem where 1 of 4 databases is partially wiped every few days.

I am careful to close AB before closing my computer at night. AB is whitelisted on my antivirus softwares. I have no special plug-ins.

It's only 1 database, and it's only about 200 stocks (of 2000) that are deleted. And it's always the same stocks that are wiped. Along with this, the charts layouts return to factory settings.

Every time I have fixed this in the past, I thought I was done. But it just keeps recurring. Pls help.