troubleshooting version

git-svn-id: https://plugins.svn.wordpress.org/an-gradebook/trunk@921415 b8457f37-d9ea-0310-8a92-e5e31aec5664
troubleshooting version to 2.4.2

git-svn-id: https://plugins.svn.wordpress.org/an-gradebook/trunk@921416 b8457f37-d9ea-0310-8a92-e5e31aec5664