As of Melodyne 5,  Celemony has stopped allowing Audio -> MIDI  conversion once the trial version has expired. I'm not sure about tempo extraction, but it wouldn't surprise me if the same was true for that. Upgrading to Melodyne Essential should allow you to use these functions again.  If you need polyphonic audio to MIDI conversion, you'll need to buy either the Editor or Studio edition. If you've no intention of buying any of the Melodyne editions, you could uninstall Melodyne 5 and r