Large Pages Pinegrow comes to a halt

Pinegrow 3.07 Pro

When opening large pages Pinegrow comes to a halt.

I am trying to bring in a very large html file from one of our facebook groups to archive the conversations offline. Eventually importing into a local database. I need to remove all the facebook junk around the content so I can see what tags I need to work with when converting the html to SQL.

Pinegrow just comes to a halt doing ANYTHING with these large files.