Hi Andrew,
5.5.1 did fix most of the problems with UPnP monitoring but my Router Names still don't display properly like before on W 8.1. The generic name is displayed only.
Hope my donation was acceptable.
Addition:
I have since updated my W 10 partition which has Build 14257.1000 on it, results are the same.
In case this helps, I am using the recommended TDI Hook driver on all of my partitions.
Best Regards,
Crysta