Thank you very much for making this Plugin and providing it free of charge!
I have two problems however:
1) In the preview windows everything works fine, but within a WordPress article, the NEXT and CHECK MY ANSWER buttons always appear both. Which is not only confusing for the users, it can also mean that the solution might not appear at all, when its deactivated at the end and the user skips it while taking the single questions.
2) In Safari I can't reach the Publish button at all. The preview windows won't pop up, when you press the Preview button at the end of the Quiz editor. It does open when I click the Preview button on the quiz overview page, but then there is no Publish button.
I guess the Publish button shouldn't be hidden this way. It could just appear beside the Preview buttons, both on the quiz overview and edit page.