Still left with an issue where my H9 max has access to the Pithfuzz, but the H9  core on the same account does not have access to it.

Ok, as rhummellh mentioned below, you should be able to get PitchFuzz on your Core by using the Restore Purchases function.  If you click on the Settings button in H9 Control’s bottom menubar, you’ll see the Restore Purchases function there.

This is not how previous updates have worked for my Max+Core combo, is something different this time?