Went thru the Bandlab assistant or tried to. The website says go to the assistant and there is a way to get the activation code for the melodyne. I was able to finish one sily remix for a contest. Probably a waste of time, but helps to figure out how to use the program.
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