Never heard of J River Media.
I use PyTivo and KMTTG. PyTivo is also like a server similar to Tivo desktop, only better. It lets you get video to and from the TiVo.
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Roamio! Oh, wait, Its Juliet!
OTA! OTA! OTA!
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!