we backup our full virtual Infrastructure by Veeam B&R. We got only 1 Physical Server left (DC). After we installed the B&R - we had no full Agent license for Windows. So we installed the Trial Licence from the Download Center. Now the License are expired. unfortunately a colleague removed the Agent from the Server befor he revoked these old License file.
Now i cant revoke/remove the Trial Licence from the License Informations because are no Server in
Could you please clarify, what's the difficulty right now? As far as I see the license has been revoked automatically because the Agent is removed from the server (based on your screenshots). A new license can be installed using the "License" tab.
As I see from your screenshot you already have a working license installed that has 4 instances left that can be used to license your Agents. Thus, feel free to go ahead and create an Agent job!
You can find more information on the new licensing scheme here and there. Please take a careful look at the conversion tables in the licensing policy.