Issue with Main Page Navigation not Updating after pointing site to directory

Issue with Main Page Navigation not Updating after pointing site to directory

I've built a site for a client using a one-page WordPress theme:
motorarzt.com
The main navigation on the home page uses Anchors to scroll to the
different pages.
I put WordPress in a directory /ma/ and then updated the index.php file
and the htacess file as normal. On the main home page the URLS are working
fine - and also working fine on the sidebar.
The problem is when I go to a single page with this theme, the main
navigation URLs are still showing the directory. Here's an example:
motorarzt.com/services/
The links should be http://motorarzt.com/#services NOT
http://motorarzt.com/ma#services
Really hoping someone here can help me out...wondering if this is an issue
with how the theme is developed and how i may tweak/fix it.
thanks! Lisa