I have done this, but I had to make sure the new Roon server was up-to-date before restoring my backup as the initial install made from current download was older than the version used to create my backup. Probably not your issue, but that’s the only time I’ve had a problem and I’ve moved cores a few times
OK - looks like my problem has nothing to do with migration - it seems like Roon can’t run on the same system as Emby - seems like Roon crashes if it can’t do uPNP/DLNA which it can’t since it can’t open UDP 1900 since Emby is using it.
Yes - my problem wasn’t with the migration - it was simply that the OpenHome code in Roon for DLNA etc conflicts with the same code in Emby since they fight for the UDP port 1900 and crash if they can’t use it.