I'm running FlexLM 8.3 to serve up approximately 150 Autodesk products (AutoCAD 2004, Land Desktop, Civil, Raster Design, Map, VIZ 2005, etc). Now I want to add four Revit 6.1 licenses, and learned I must upgrade the FlexLM to 9.2. I was told by our local reseller support techie, that I can install FlexLM 9.2.2 in situ, right on top of the FlexLM 8.3, and it'll upgrade it to 9.2.2 without problems. Reading in this NG, it seems that there are other more cautious recommendations, such as backing up the previous FlexLM executables and stopping the service before attempting 9.2. Any suggestions? I have some trepidation about this because of a similar scenario, on a different license server box for our ESRI ArcGIS licenses, that also uses FlexLM (an older 7.0b version), and when I attempt the upgrade there (service stopped before installation), it toasted the setup completely, and I had to reinstall the previous version.