I recently installed Windows 10 and installed GW. It works fine letting me know whats connecting and so fourth with ‘click to block’, but if I use ‘ask to connect’ it blocks all connections and there is no pop up notification to allow or deny. It worked well on 7 and 8.1.
P.S.: It DID help with the problem, so if you are experiencing this notification bug, email GlassWire support to get an update version. Bonus: no need to reactivate the app, kept my Elite status even after doing a reinstall!