John and Noel (and all others who responded),

I only used Download manager for one file (RealTracks294-300). It downloaded ok, and seemed to install (i.e.,claimed to install) but would revert back as if it did not. So, I took the long road and downloaded each set group that was relevant. After installing all the sets that had 1 or more RTs (in some cases all) missing I would run StylePicker between each download and install to check the results. Currently, I am no longer missing any RTs. Maybe I'll make a suggestion to PG to split the Set groups into individual sets (there were some cases I only needed a few out of one set). In those cases, the download would likely have been much smaller. I suspect either one or more of the upgrades caused the missing RTs (since I've always kept the default locations) and I haven't moved anything around. (NOTE: I have all the Hard BBW hard drives/ Extras DVDs, but did not want to do regressive re-installs back to 2016.

Thanks again for everyone's input and suggestions.

Rich