Project Folder in Developer Utilities doesn't show all folders
I'm running Filemaker Pro Advanced 12.0v4 on Windows 7. I routinely use the Developer Utilities to create standalone versions of a database. Tools|Developer Utilities|Project Folder usually lists all folders mounted on my machine as possible destinations for the standalone database. As of today, it only lists my desktop as a possible location, even though other filesystems and folders are available as confirmed with Windows Explorer.
Any suggestions for restoring the complete list of available folders/filesystems in the Developer Utilities Project Folder would be greatly appreciated.