Your files and data belong to you. You can always save your data to your PC's hard disk at any time and take it with you if you leave our service.
If the software application you're using isn't one of the ones you rent from us (Sage Line 50, Sage Payroll and MS Office), but one you've bought outright we'll simply uninstall it and delete your license key. You then can install your software again wherever you've moved to.