“Pretty WordPress Permalinks on IIS” screws up WP’s CMS

I have a problem. I’m using WordPress as a CMS/blog. And I installed this hack for “Pretty WordPress Permalinks on IIS”

For some reason this hack disrupts WP’s ability to display my designated home page.

Otherwise, all of my other pages and blog entries show up just fine with their “pretty permalinks” enabled.

Once I revert to the default WP permalink structure, the home page becomes viewable again.

My set-up is as follows:

WordPress address (URL): https://www.thecanadiangeek.ca/wordpress
Blog address (URL): https://www.thecanadiangeek.ca/

Front Page: Home (https://www.thecanadiangeek.ca/)
Post Page: Blog (https://www.thecanadiangeek.ca/blog)

I suspect there is a simple solution to this problem. But I’m not a PHP geek, so I would appreciate advice.