This error displays when you’ve installed a later version of Shoppa than the Shoppa version set for the account that you are logging in to. You will need to reinstall Shoppa with an older version to be able to resolve this issue.
Follow these steps to resolve the issue:
Exit Shoppa
Type “programs” in the Windows start menu
Click “Add or remove programs”
Find Shoppa in the list and press “uninstall”
Download Shoppa from this link: www.shoppa.com/webftp/Shoppa.exe
Right click the file and click “Run as administrator”