In previous posts I wrote about installing Mailenable and Mailenable Pro in same folder, today I found that If you are not sure about using Pro version of Mailenable it's highly recommended to install it in another folder :D ! Because If you want to uninstall it you will lose Mailenable at all!
Anyway, After removing Mailenable Pro, I couldn't use mailenable. I couldn't uninstall it byusing control panel and changin Plesk . Even reconfiguring Plesk doesn't help me to remove Mailenable standard edition! Mailenable wasn't available as a service in Plesk, and in component management, Plesk shows that mailenabe standard edition is not installed, but I had has not been removed completely and didn't work correctly.
Solution : At the end I used Mailenable uninstall procedure. It completely removed Mailenable ( I used install.log which was available in Mailenable folder) Then I removed all Mailserver components (webmail,mailenable,spamassassin,..) from plesk and installed them all again!