[Plugin: WP Survey And Quiz Tool] Quizzes are not saving results

Ollie, I’ve been having this problem for a while now. Quizzes are not retaining any results at all. Apparently a downgrade helps but that seems like an over the top fix.

Any idea?

Here’s the last post where other people were talking about this issue as well.
http://wordpress.org/support/topic/plugin-wp-survey-and-quiz-tool-quizzes-are-not-saving-results?replies=6

http://wordpress.org/extend/plugins/wp-survey-and-quiz-tool/