I just bought the plugin and faced the very same problem. As a temporary workaround, I solved the issue by doing this:
File: ./core/compatibility.php
Line: 409
Change
from: ‘taxonomy’ => ‘post_taxonomy’,
to: ‘taxonomy’ => ‘taxonomy’
Of course this is a bad solution; but it works for now (as I don’t intend to use “Post Taxonomy” option).
Hope this helps and we get a fix soon.
