Sorry for the late reply , i was held by another project , i found the problem and a workaround, testing again the functionality i came up that after upgrading to pro version you may not create a page name “Timeline” i have tested deleted the non functioning page named “Timeline” and the same behaviour occurred ( trying to edit the page with Divi crashes redirecting you to home page). I named my timeline page anything else than “Timeline” and it works perfectly.
Thanks for your attention.
deactivating the plugin does nothing, removing the pluggin completely works, i use 3.9.1 WP & PHP 5.3