Recover files after Paragon HFS+ Corruption
Solution 1:
HFSExplorer was able to see and recover some of the files, but most were missing.
Paragon did refund my purchase, after a few attempts at looking at the output of OS X repair commands which showed errors, which apparently they tried to reproduce, and my refusing to send them a dump of my hard disk. I have had no problems with their OS X product to access NTFS drives, and have used that much more extensively.