As you can see on the official web page, Mac2TiVo is not for moving files to or from TiVo. It allows you to convert Quicktime files to MPEG2 files supported by the TiVo device. I suggest you contact the developers for further information. You can get in touch with them using
1-877-582-6735 phone number.
Note: In order to transfer files to/from your TiVo devices, I suggest you use Google search engine to find tutorials and guides.