What did I do wrong?
Database manager reports database has a serious problem!: Failed to connect to database: TMainDBMgr.Database does not exist! “C:\ProgramData\High-Logic FontService\data\fonts.db3”
The other day I used FmsConfig.exe to create a backup, and moved the backup to DropBox.
I will contact you on Monday to help solve the problem.
This is the thread where I did the backup. The backup folder is in my DropBox, which I figured would be the best place to keep it.
Copying files to dropbox doesn’t usually remove them from their original location.
I knew I forgot something 
Please accept my applogies. I’ll retry tomorrow.
OK. Thanks for your help.
All is sorted now. No bugs ,just user error as usual. 
Thank you for your patience. I’m glad we were able to solve the issue!
Enjoy the software.