I didn't, but I did come up with a cunning solution!
I still had the previous installer for version 1.4.14 of the NSU software, so the only problem was that it kept doing this version check which made it want to download the new version of NSU.
So.. using Charles, an http proxy debugger, I captured the version check requests being sent by the software, and got Charles to rewrite them to downgrade the returned version number, fooling the NSU software into thinking it was still up to date

Genius if I do say so myself.
The end result is that I can continue to use the old version until they fix whatever it is they broke!
Let me know if you'd like any more info on following this route, otherwise I hope you get sorted.