Call to undefined function themekey_theme_options()

After enabling the module and assigning it to a vocabulary and terms of a vocabulary, I go to the voacbulary page and click edit on a vocabulary. I then get the following error: Fatal error: Call to undefined function themekey_theme_options() in W:\www\bayer\sites\all\modules\taxonomy_theme\taxonomy_theme_admin.inc on line 102.

I can go to the List Terms page with no problem, but when I click the edit link next to any term, I get the same error, but its on a different line: Fatal error: Call to undefined function themekey_theme_options() in W:\www\bayer\sites\all\modules\taxonomy_theme\taxonomy_theme_admin.inc on line 88.

Looks like it needs the following at the start of that form_alter function:
require_once(drupal_get_path('module', 'themekey') .'/themekey_build.inc');