Hello Mike,

Quote:
the OK and Generate button is grayed out in picker


I see that as well, in the "Select Best..." dialog. The [OK + Generate] button would be the equivalent of OK, and then selecting 'Track actions -> (re)Generate...' Not sure why it is missing but will investigate.

Quote:
the real tracks eventually will quit generating

Here is a link to a build 807 patch which will be available on the site soon - it does fix an issue with silent RealTracks in some cases, although I'm not sure from your description if this is the specific issue you are seeing.
https://nn.pgmusic.com/pgfiles/support/patches/bb2021_win_update_build807.exe


Andrew
PG Music Inc.