In most cases, the file hasn't been deleted — it's been moved, renamed, or is in a location you're not expecting.
Search your computer for the file
Open a Finder window (Mac) or File Explorer (Windows) and search for .myo — this is the file extension for all AccountEdge company files. Every company file on your machine will appear in the results.
Check your backups
If you've been backing up regularly, you can restore from your most recent backup. The restored file will contain everything up to the point that backup was made.
If the file isn't anywhere on your computer
If the .myo search comes up empty and you don't have a backup, the file may have been deleted or the drive it was stored on may have failed. AccountEdge company files are stored locally — they aren't backed up to a server unless you've set that up yourself.
For tips on setting up a regular backup routine, see Backing Up and Restoring in AccountEdge.
For more help locating your file, see Can't Find Company File.