I did get "version 4" and should have known better. Flaky company, DxO.
I had to manually remove all previous folders where the NIK modules were hiding and then reinstall v4.
Seems to work properly, but when I load SEP as a filter, the badge that appears as it is loading reads, "Silver Efex Pro 3" which is ridiculous.
Although I use SEP a bunch, most of the collection is CRAP and I wish I had stuck with the original Google version as posted by Rhossydd already.