Moving to a higher edition (for example, Premium or Enterprise edition) - If your business requires a richer set of accounting features, you can upgrade to the latest version of another Sage Simply Accounting edition. This option also upgrades your version of Sage Simply Accounting if you are not already using the latest version of the program.
Adding more user licences - If you want to increase the number of concurrent users in Sage Simply Accounting, you can upgrade your program to allow more users. If required, this option also upgrades your version and edition at the same time.