Holger, you could migrate the Ridgeline 3.1 database to Ridgeline 4.0 on a separate install. This would retain the Ridgeline 3.1 install. We can also migrate the database for you and provide you the SQL file needed for NetSight. In order to do this, we will need the basecamp and epicenter db files from Ridgeline 3.1. It would be best for a case to be opened with GTAC to further proceed, if you would like us to do this.