Changing the licence number on all AVG clients. If you want to change the AVG License Number for all computers in the network, please do the following: 1  Run AVG Admin Console. 2  On the left navigation tree expand Licenses, and then click Shared settings. 3  Double-click Shared settings in the Shared settings area.4  Enter the new license number, and then press ENTER.ou can reactivate the AVG Admin Server with the new AVG License Number as follows: 1  Run the AVG Admin Server Monitor. 2  Click Server settings, and then on the General tab, click Change.