create a mostly read only CPT

I have a CPT that gets its data by reading from an external server. The external server is the master of the data and my plugin stores a replication without an ability to update the master, therefor the ability to edit the content will just confuse the user, might even make him think that the master will be updated by the edits.

How to change ‘with_front” key from an existing custom post type?

I have a CPT called ‘experts’, that has been created in a theme I bought, and I can’t find out where nor where to change it.
I need to change a parameter to ‘with_front’ => false
Because my general permaling structure goes with /blog and I do’nt want experts to be in /blog/experts.
Is there a way I could do that adding something in the functions file?
I have tried this (How to set “with_front’=>false” to a plugin-generated cpt?) and various things, but could not get it to work.
Thanks 🙂