Nothing recording tonight, so I was able to install 24.0.68 without interrupting anything. I resynched the Apple Lossless files and there's no change. I also took a look at things in a few file viewers and found what seem to be somewhat odd results as follows:
Windows Explorer, with the "Ratings" column added:
1) The original FLAC files don't show a value for rating, even though JRiver shows ratings for all of my audio files (Unexpected result)
2) The exported MP3 files DO show a value for rating and from spot checking, the values are correct (Expected result)
3) The exported M4A (Apple Lossless) files don't show a value for rating (Unexpected result)
MP3Tag:
1) The original FLAC files don't show a value for rating, even though JRiver shows ratings for all of my audio files (Unexpected result)
2) The exported MP3 files don't show a value for rating (Unexpected result)
3) The exported M4A (Apple Lossless) files don't show a value for rating (Unexpected result)
MP3Tag has several possible columns for rating ("Rating MM", "Rating Winamp", and "Rating WMP"), as under the "Extended Fields" category, so I added all 3 to my view, but none of them show a value.
Most, if not all, of the CD's were originally ripped with JRiver using the FLAC encoder. Most were ripped several years ago, but at least a few were ripped recently, one as recently as a few weeks ago (11/28/2018) with JRiver 24.0.19.