Workarounds:
Option 1:
1. Adjust the connection values in the Default.Client.Connection.config.
2. Launch the GPMC Extension.
3. Wait for the timeout.
4. Click the Connect button and connect to the desired server.
5. Re-adjust the connection values in the Default.Client.Connection.config.
Option 2:
1. Open the registry on the GPOADmin extension host.
2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Quest\GPOADmin\GPMCExtension.
3. Set the ServerName value to the desired server.
4. Close the registry.
5. Launch the GPMC Extension.