Changes made for Pathfinder V5 PC's.

1. First startup after update: FeatureGroupMigrationVersion doesn't match Application.ProductVersion ? runs the migration, stamps the version
2. Subsequent startups (same version): version matches ? skips immediately
3. Next update changes the version ? migration runs again If you disable a machine option and restart, it won't get re-enabled because the version stamp matches and the check is skipped.