Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, eg. uninstall Max's Pitch Package, etc. That can make things worse.
Before you post make sure you check the Help FAQ for an instant solution first. Then, if you can't find it there, you can post your problem here and we'll get to it ASAP (within 24 hours), but be sure you:
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INCLUDE AT LEAST ONE SCREENCAP IN YOUR POST TO SHOW THE PROBLEM!!!!!!!!
explain the problem clearly
I was working on simulation 1b, purchased the package, and followed all steps carefully. However, on step 18, when directed to select “Pitches” in the “Available Tabs” box, “Pitches” does not appear. I scrolled all the way down under “Libraries”, and “Pitches” is nowhere to be found.
Ok, thanks!