i opened the link in your post where it lists the following instructions
i completed steps 1 through 3 but there is no "Configure Internet Explorer Integration" in the list of Settings that i can double click on in step 4.
the image above shows the user configuration. the computer configuration looks exactly the same. i'm still able to view the mht files but i'm having to do it with Internet Explorer directly, not Edge. i went into settings > apps > default apps > choose default apps by file type and selected Internet Explorer for the mht and the mhtml file types.
i don't see this as being a smartbear issue, however, so i sent this same information to microsoft yesterday but haven't heard anything from them.
