Change in urls - change "courses" to "services" and "events" to "workshops"

To change the URL from courses/ to service/ Cause services is already in use on your site. 

Edit file >> Education >> Lib >> Admin >> Custom-post-types >> courses.php 

Find 

'rewrite'            => array('slug' => esc_html__('courses', 'education')),

Replace With

'rewrite'            => array('slug' => esc_html__('service', 'education')),

To change the Course Groups to SErvice Groups in same file above 

find

'rewrite'           => array( 'slug' => 'courses_group'),

Replace with

'rewrite'           => array( 'slug' => 'services_group'),

Which i have done for you. Also in case you want to change labels you can edit this file and change the labels as per your requirements. 

To replace URL of Events to Workshops you can edit file 

Education >> lib >> admin >> custom-post-types >> events.php 

Find

'rewrite'            => array('slug' => esc_html__('events', 'education')),

Replace with

'rewrite'            => array('slug' => esc_html__('workshop', 'education')),

To change event_groups to workshop_groups

Find

'rewrite'           => array( 'slug' => 'events_group'),

Replace with

'rewrite'           => array( 'slug' => 'workshop_group'),

To change labels you can edit same file and update the labels. The above change i have made for you. 

After changing the slug of Custom post types you always need to reset your WordPress permalinks which i have done for you. So all seems great

WordPress migration isn't part of our support however we offer special WordPress migration service which cost 50$ but as you are already our customer we would do this for you in just 20$ and include Performance Setup, Updates, and Compatibility check in 20$ 

Thanks