QuickBooks 2015 cant open company file
Problem: Quickbooks Premier Edition 2016 cannot open the company file because the file has been updated to a newer version of Quickbooks.
Solution: Restore a backup copy of the file that was made before the file was updated to the newer version. To do this, click OK then click "Restore a backup file" in the No Company Open Window. Or Upgrade your version of Quickbooks to the latest version.
I can't restore the back up copy so I can only go with the upgrade option. How to upgrade my version of Quickbooks to the latest version? I tried Update Now and it didn't work. I still can't open a back up file that I created with a newer version QB.