Rated 5 out of 5 stars

Just it exists in the first screenshot.

This review is for a previous version of the add-on (3.2.1.1-signed). 

Uhm, that's the window border of Windows Classic.

Rated 5 out of 5 stars

Great add-on. But what is the black stripe on the right of dialog box?
Please fix it if it's not difficult.

This review is for a previous version of the add-on (3.2.1.1-signed). 

There is no black stripe. Your theme might be broken.