html extension

Hi,
I am using a plugin called ‘Add HTML to page’ to keep my original post structure from old Typepad posts. But i’m beginning to think my blog post address is looking weird & could possibly affect Google rankings.

i.e https://www.martincrombie.co.uk/weddings/blog.html/page/4/

Is there a way to change it to https://www.martincrombie.co.uk/weddings/blog/page/4/
without de-activating the plugin and endless redirects?

Cheers Martin