Changing the Single Event Page URL from stec_event/ to event/
Go to Dashboard -> St. Event Calendar -> General -> Tools tab.
Go to the Permalinks section and edit "Event single page permalink" option from "stec_event" to "event". Then click on the "Save & refresh permalinks" button.
To change Single Event Page URL from "stec_event" to just "event" we will have to add few lines of code.
Open your theme functions.php file and on the bottom add this code:
update_option('stec_permalinks', array( 'calendar' => 'stec_calendar', 'event' => 'stec_event', 'cron' => 'stec_cron', 'edit' => 'stec_edit' ));
Edit "stec_event" to just "event".
If you get 404 error or the permalink did not update do the following:
Go to Dashboard -> Settings -> Permalinks and just click Save Changes without doing anything.
After changes take effect you can remove the update_option(...) code.
If the problem persist just open a ticket and we will take a look.