Installed Sage 2018 and did a test migration of data from an existing Sage 2016 install last night. This morning the client is unable to open Sage getting the ""No valid activation found"" message. Checked and found that activate.pvx had been renamed to migrate_activate.pvx which we have seen before. Renamed it back to activate.pvx and now getting an Sy_InvalidReg: error. Tried restoring activate.pvx and same message. No hits on the Sage KB or Google. Not sure what to try next, any suggestions?