If you believe ActiveWords Sync is not properly synchronizing, first make sure all installations have the same build number (check "About" on the Icon right click menu).

If you still have issues, set Sync to "None" in the "Sync" tab of ActiveWord Options for EACH installation. Then set Sync back to the desired cloud service for EACH installation, one at a time.

This will re-establish the database file in the "ActiveWords Sync" folder on each PC.