Remove 'portfolio-view' from url address permalinks

I have installed a new template that has Portfolio posts in in.

However, it gives a url of :

https://www.sitename.com/portfolio-view/post

How do I hide the ‘portfolio-view’ so that it only shows the post part?

https://www.sitename.com/post

This is the CSS code I have which seems to suggest portfolio-view shouldn’t be visible but it is:

‘rewrite’ => array(‘slug’=>”,’with_front’=>false),

Permalinks is:

/%postname%/

I have Breadcrumb navXT installed but don’t know if this changes it or not?