If you can’t deactivate GlassWire where nothing happens when you go to the top left GlassWire menu and choose “deactivate” please try this.
Please right click the Windows taskbar and choose the Windows task manager, then find “GlassWire” under services and stop the service temporarily (by right clicking it).
Next remove the file license.dat from the C:\ProgramData\GlassWire\service folder.
Now Exit GlassWire at the top left menu by exiting it, then restart the GlassWire service.
Now restart GlassWire and try activating with your license.