After an hour or so of trying to figure out why Tivo Transfer no longer saw my Tivo (it worked a month ago), I finally stumbled upon the reason.
My default JVM/JRE was set to JSE 6.0 (64-bit only). Once I changed the default JRE to 5.0, my Tivo was recognized. Mac2Tivo had no issues with either JRE.
Just a thought if you're having issued with Tivo Transfer seeing your DVR.
-sk
