Mutiple PW dialog boxes

In the past, I used a batch file with XCOPY to keep copies of my Port FFox folder, on different thumb drives, synchronized.
I am now using Robocopy which deletes files not in the source.

However, I am sure due to old files not being deleted, when I load Port FFOX, I get asked for the master PW 3 times.
It appears as if there are, on the screen, 3 copies of the PW dialog.

Any suggestions for would be appreciated.