Honestly, it really sounds like you have more issues going on than just database corruption.

Your entire phone and conversation history disappearing could happen from el-v1.db being mangled, I think, but it is not typical when that database corrupts.

I never saw ringtone settings of any sort saved in there, which is why I mentioned it probably wasn't, but I acknowledged that maybe I missed it and it was secreted away in there, as unlikely as I think that is (as I looked pretty thoroughly through it).

But I know for a fact your backgrounds (I presume you mean desktop backgrounds) have nothing to do with the rtcom-eventlogger database. In fact, I'm pretty sure they don't have anything to do with any other databases that might be on the phone either.

The more you describe your issue, the more it seems like maybe there's something worse going on here than just corruption of the rtcom-eventlogger database.