Thanks for providing the version 6 for testing (got via private email).
I can state that version 6 is (at least in my setup) generally faster serving my licence key from the USB donge than version 7.
BUT: Version 6 produces at lot of kernel load which makes my machine much slower. Version 7 does not.
I now am back to Version 7 taken the disadvante of slower serving the licence compared to a faster machine.
I am using Windows 10 running in a virtual machine (Parallels 11) on an iMac with OS X 10.11.1 (ElCapitan).
I do not know if really USB Network Gate is the actual software causing the problems or OS 10.11. I heard rumours that OS X 10.11 has USB problems. Apple is known to make things worse by updates.
I am using the most up-to-date date software combination (NWGate, OSX, P11) and is it not working well together.