File name Rated 5 out of 5 stars

hi, is there any way to remove that annoying filename area?

This review is for a previous version of the add-on (2.1.1-signed). 

Turn on "Show Caption"

That filename is the site's tooltip.

You can hide that by turning on Thumbnail Zoom Plus' "Show Caption" option in its Preferences window. Also make sure "Delay before showing image (sec.)" is less than 0.5.