I have been having this issues for several days and cannot get it resolved.
I have one good file that I archived and use as the source for trying to fix this. Quicken will open the good file and not doing anything to the file I will close Quicken. After some time I'll reopen the file and 3 years of transactions are missing from every account register.
I tried the save backup, export and import to a new file, and super validate. Nothing works. Quicken is completly useless for me now.
Any thoughts……..