Where were your custom material files saved? If they were saved in the SW installation folders they may have gone poof when you upgraded. If they were saved somewhere else are you still pointing to that location at Tools > Options > File Locations > Material Databases?
Where were your custom material files saved? If they were saved in the SW installation folders they may have gone poof when you upgraded. If they were saved somewhere else are you still pointing to that location at Tools > Options > File Locations > Material Databases?