thank you for responding so quickly.
I have tried both deleting the .dat files AND renaming the configuration folder, but hte problem persists.
When I went in to rename the configuration folder, I saw another folder called Configuration-1 in addition to the Configuration folder.
After renaming, now when I look in Finder there are 3 folders:
I don't know if this has anything to do with my mac's confusion. It certainly contributes to MY confusion..
Please let me know what to try next,