How To Edit Registration Page?

Hi sir! I am setting up my Arcane site and it looks stunning.
I have installed UserPRO to get more social functions and some more “modern” look to this part of the page, but I cant seem to find the string to edit in the .php to change the registration site? Also need to change the login site and “My profile” in the dropdown. Can you provide some info here? I tried deleting the original register sites, but they just pop back up by themselves somehow.

Best regards.