Hi Dan,
Could you please try the following:
1. Stop Xeams service in App Center.
2. Go to your installation directory of Xeams. Rename the db folder to something else (like dbold)
3. Start Xeams again. Xeams will re-build the database.
If you are still having issues, please send us an email to support@synametrics.com so that we can further troubleshoot the issue.