Quickbooks 2019 for Mac - Unable to restore from backup
I need to open a file version that is between 2 and 24 hours older than my current file (there's now some reconcile error in a register history that I don't know now to resolve).
QuickBooks 2019 for Mac, Version V18.0.5 R6, under Mac OS High Sierra 10.13.6
I am finding that each time I attempt to open the (filename).qb2019, I see an error dialogue pop up : 'The document "(filename).qb2019" could not be opened'.
The originally stored backup file looks like this : (filename).qb2019-19-06-23-10h19m25s.dmg (from folder called Backup Files)
Double-clicking on it mounts a volume in Finder with same filename
The volume contains 2 files : Restore Instructions.pdf, and (filename).qb2019
And that's where the process ends. It is not possible to go any further. I can try double-clicking on this qb2019 file, or I can try browsing to it from the Quickbooks navigation window. In either case, the same error message results.