I managed to get NX Studio 1.7.0 installed on my Win11Pro box, after removing the bad 1.10 version.
NXS 1.7 does not require NikonID login and runs a tad faster. Still very slow browsing on networked drives, but once the software decides there are acceptable NEFs to be found, it treats them much faster than the 1.10. Zooming in and out is quick, changing exposure and other adjustsments occur without too worrisome delays. For files on the local machine, 1.7 operates pretty fast.
I consider the slowness and troublesome behavior of 1.9/1.10 to be the classic symptom of two companies co-operating in a bad manner. Both Nikon and Microsoft are to blame for the unusefulness of NX Studio 1.10.