It's there in the changelog file available within vQuiz package. Pasting it here as well:
vQuiz 2.5.31
# Bug has been fixed
vQuiz 2.5.30
# Bug has been fixed
vQuiz 2.5.29
# Bug has been fixed
vQuiz 2.5.28
# Bug has been fixed
vQuiz 2.5.27
Issues Fixed
# Fixed bug in branching while playing quiz.
# Fixed bug in sending mail when guest user filled lead generation form.
vQuiz 2.5.26
Issues Fixed
# Fixed bug in branching while updating rule.
vQuiz 2.5.25
Issues Fixed
# Fixed Multi-lingual issue in the CSV file exported.
vQuiz 2.5.24
Issues Fixed
# Fix bug in print/copy of quiz result
vQuiz 2.5.23
Issues Fixed
# Fix bug in copying quiz
vQuiz 2.5.22
Issues Fixed
# Fix bug in export csv result for random questions and options
vQuiz 2.5.21
Issues Fixed
# Fix bug in Quiz setting end publish date
# Fix bug in export csv result
result csv
vQuiz 2.5.20
Issues Fixed
# Fix bug in Certificate template
vQuiz 2.5.19
Issues Fixed
# Fix bug in vQuiz Module
vQuiz 2.5.18
+ we can Enable/Disable audio notification alert while playing the Quiz(Enable Audio)
+ we can Show description below quiz title while playing the Quiz(Show Description)
# Fix bug in circular skip random question
# Fix bug showing category with sub-categories
# Fix bug dispalying next quiz, previous quiz buttons on result page
# Fix bug in storing and deleting of personality messages
# Fix bug Double Processing Bar on result page
vQuiz 2.3.2
+ Implement Conditional Branching
vQuiz 2.3.1
+ we can set Quiz Prepare Content
+ we can set Question Prepare Content
+ we can set Circulate Skipped Questions
+ we can set Enable it to let the user save the Quiz in between to complete it later (Quiz Draft)
+ we can set Disable print and copy in Quiz section page with mouse or keyboard (print/copy Disable in quiz section)
+ we can set Config Certificate-Number with prefix,types,format,number of digits and suffix
+ we can set Random options in a perticuar quiz
+ we can set Completion Level Show/hide in quiz
+ we can set Display Quiz Result end of the quiz or send through email or view in Result section
+ we can set Multi Category Personality
+ we can set Allow quiz only given Ip-address
+ we can set Certificate Each Quiz with many options
+ we can set Answer type text-field with answer and check Case sensitive option
+ we can set Answer type textarea
vQuiz 2.3.0
+ Category answertype
+ Multi Personality with multi weight enable/disable option
+ Multi Personality Persentage show above given percentage option
+ Print result and result-preview issue in chrome are sort-out
+ Set images paths are relative in editor trivia and personality Messages
Thanks
Daniel
