We recently just upgraded out UMG license to be an unlimited license. We are running DNN 6.1 so we have UMG 8.10.1. I have reactivated the SN and it doesn't seem to remove the error message our page is receiving. The error message is: You are allowed 3 UMG instances. It appears you already have 30.
I'm not sure how that is possible since we have an unlimited license...