https://community.appian.com/discussions/f/administration/8287/recovery-plan-of-upgradeHi All, If for some reason, we have to revert back to previous version from 7.11. Do we have to delete JDK 1.8 &amp; reinstall JDK 1.7? Thanks Rishu OriginalPostID-231054en-USTelligent Community 12https://community.appian.com/thread/36268?ContentTypeID=1Wed, 24 Aug 2016 23:38:05 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:12334f60-cbf9-433c-a172-9fb63eb1fd35rishubThanks Alok.<div style="clear:both;"></div>https://community.appian.com/thread/36265?ContentTypeID=1Wed, 24 Aug 2016 23:10:05 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:fdf829ac-a500-4b2e-ad78-301499c6cb6bAlok MohareYou don&#39;t need to delete the 1.8 JDK. You can simply change you System Variable for JAVA_HOME to point to JDK 1.7. <br /><br />Additionally, please review the System Requirements for the older version of Appian to check the supported Java version for the Application-server that you are using.<div style="clear:both;"></div>