Assorted minor glitches

oldblock

I'm running DS4 in Windows 7 on two screens. Because I have a persistent strip of background from other screens that won't go away (see Mysterious blue stripe) I have been un-docking a few tabs and sliding them elsewhere. I have discovered that some don't work unless they are partially in screen one.
Does Daz have any settings for dual screen work?
Reading this forum I'm thinking about reinstalling to see if this helps and also do a backup. Where do I find the database that has been mentioned in (Housekeeping and Maintenance for DS4) and what is it called?