When I try to open my company, I get the error message: "Your Sage ID is valid but you do not have sufficient rights to access this company. Sign in as a different user or close this company and contact the file owner/creator". I am the file owner and creator. I don't know what to do. I've only been using Sage for about 6 months.
Have you tried right click on Sage 50 icon and right click select "Run as Admin"?
Do you only have more than one Sage id?
Anything change recently on computer?
hope this help