I am running 2021 Sage 50 Pro Accounting (for my business as well as 3 others).  My accountant did some changes for me on our business file and sent it back to me.  They used a newer version than what I'm running . I was under a time crunch so I did what I thought was a simple update to carry on.  I now have 2021 and 2022 on my desktop.  I posted away on the newer 2022 version.  Now when I go to open the 2022 version it wants product activation and it won't accept the Account ID or Key Codes. Because the file was worked on on a newer version the 2021 won't open it either.  So now I'm at a standstill and I need to get my work done :-S  If I could buy a new version and carry on, I would have no problem with that but I'm not down for the new "yearly" subscription so I'm trying to avoid that at all costs unless I have to.  I don't want to mess around too much and screw it up so much that I can't work on the other companies in the 2021 version since I can at least get their stuff done.  Any tips ?  Is their away to convert my 2022 cab file back to my 2021 version ?  When you upgrade from 2021 to 2022 is there a cost ?  Any tips appreciated.  Thanks