After the installation of the recent version of GLM you always should make sure that the firmware of your GLM network adapter or 9320A, speakers and the subwoofers is up-to-date. Here is how you do it:
Select "Info" in the lower left corner of GLM's main window and click on one of the icons of your speakers or subwoofers. In the info panel select 'Firmware'.

Select the devices to be updated and click on 'Update.

To update the firmware of your GLM network adapter (GLM Calibration Kit) or your 9320A, please click on the icon in the middle of the grid. In the info panel you will see an 'Update' button if a new firmware is available. Click on it to start the update process. The 9320A will turn itself off and on again automatically.

If you're using an old setup file from GLM 4, the adapter icon might still be located in the bottom left corner.