To update a product to the newest version, it’s recommended to create a new project using the latest product version and migrating all changed files separately to your existing project. Keep the migration target project closed when migrating.
When migrating one file, the engine also tries to migrate other files as well. To prevent a mess, just hit “Replace” for the file you want to migrate and “No All” for all other files. Use the Update-Log to see which files have changed and need to be migrated.