I installed Sage 50 Pro yesterday and uninstalled 2011 Accounting Version. I can open 1 of the 2 companies, however I get an error message that reads "This data has been updated to a new file format and is now incompatible with this version of the software. Once you upgrade data to a newer version it works with the new version only".
Nothing was changed, they are both under the same Main company, just 2 divisions. Need help, worked on it 3 hours yesterday.