Updating NAS server version made the client unhappy

Being a happy user for several years with a quite simple setup: Synology NAS with VH server license serving a single Win10 client.
Client version is v4.9.7, running as a service. After updating the server from v3.9.4 to v4.1.1, the client now is unhappy, telling me that he can only connect to licensed servers. Does the v4 server require a new license key?

Synology packet manager disallows downgrading the package, so right now I am somehow lost and appreciate any support.

Best regards,
Udo Keller


You should be able to upgrade for free without trouble, but it seems like the serial might have changed for some reason. Anyway email me mail [at] virtualhere.com and ill resolve the issue