version and release notes

readme.txt

@@ -4,7 +4,7 @@ Tags: quiz, survey, lead, test, score, exam, questionnaire, question,wordpress q
 Requires at least: 4.9
 Tested up to: 5.3.2
 Requires PHP: 5.4
-Stable tag: 6.4.1
+Stable tag: 6.4.2
 License: GPLv2
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -118,9 +118,8 @@ This is usually a theme conflict. You can [checkout out our common conflict solu
 
 == Changelog ==
 
-= 6.4.1 () =
-* Bug: Solved Email without @ ( https://github.com/QuizandSurveyMaster/quiz_master_next/issues/831 )
-* Bug: QSM is not sending email to user
+= 6.4.2 (Jan 27, 2020) =
+* Bug: Solved Email without (https://github.com/QuizandSurveyMaster/quiz_master_next/issues/831)
 
 == Changelog ==