Finally got around to trying this today. AND... IT WORKED! Thank baby Jesus! Recovered around 25 lost SkipMode files. Used Tivo Desktop to pull episodes off the Tivo, then went to Recordings>Devices>Now Playing and pulled them back to the Tivo (never deleted the originals so these were duplicates). Oddly, the SkipMode data was applied to the original recordings, so I deleted the dupes. It's a stupid, lengthy, PITA method to get a file that's probably 20 bytes in size, and should have been re-applied by Tivo servers after they botched the existing SkipMode data on my Tivo, but at least now I won't have to manually cut commercials before re-encoding later on.