Same problem. Enabled debug mode, error message with the Demo Quiz when trying to Manage Questions:
WordPress database error: [Table ‘db1247616_humanresourceexcelence.wp_watu_answer’ doesn’t exist]
SELECT Q.ID,Q.question, Q.answer_type as answer_type, Q.is_required as is_required, (SELECT COUNT(*) FROM wp_watu_answer WHERE question_id=Q.ID) AS answer_count FROM wp_watu_question
AS Q WHERE Q.exam_id=1 ORDER BY Q.sort_order, Q.ID
Please help with this.