Updated to latest version (3.0.4), chose Options -> Options -> Cover Art -> Cover Art Providers, tried to move AudioDB to top of list and Local Files to bottom of list, clicked Make It So! and then did some work.  Came back to Options and order was not saved. Did reorder again and closed app.  Returned to app, no change to order.  Checkbox selections are being retained.  Tried several times with no success.