I have downloaded the beta for melody but it is mising the rhythm, tension or pattern section which makes it pretty useless?! That is not really a beta for me ...
I just purchased the plugins and found same problem, but when clicking on the "FILL" icon all the things you are looking for appear above the piano roll. Yes they need the work on the Windows version for sure! I found that with the fill you can also make the melody!? (Strange!!!).