I hate to add to your already long TODO list. ;-) I have several databases, each for a specific callsign I've used and am using QTH profiles to manage my operating locations. So far, so good.

I have found that when I open CQRlog anew and select a DB, work in it a while, and then select 'File|Open or Create New Log' that after opening the second DB (or any subsequent DB) the profiles remain from the first DB open. Closing CQRlog and then selecting the desired DB at the program's start results in the proper QTH profiles being available.