When you select one or more domains in your VMS which are hosted or forwarded accounts, clicking "change application" will present you with a list of applications, with checkmarks beside the applications that have been enabled. If you have selected more than one account, then only applications which are enabled for all selected accounts will have a checkmark displayed beside them.
To disable one or more applications for the domains you have selected, simply remove the checkmark beside each application, and click "ok" or "apply". To enable one or more applications, place a checkmark beside each desired application, and click "ok" or "apply".
Clicking "cancel" will abort any unsaved selections you may have made, and return you to the domain settings main menu.
Please note that enabling applications which are not permitted by a domain's package type (e.g. enabling EasySiteWizard for a parked domain) will still not be accessible within WebsiteOS for that domain.