Powershell Script- Change List View for All subsites under site

Hey Everyone,

This may sound a bit confusing in my explanation. Hopefully not.

I have a site called 

https://blsconnect.brooklaw.edu/classes/16-WN/default.aspx

web application is called: BLSConnect

under this site, I have about 100 subsites (too many to count). 

All of them are using "class documents" document library.

It looks like this.

I need to change the "file title" column, to the name(linked to document) column.

and keep everything else. How do I do this. what is the code?

Can someone please. help me out here?