Invalid file hash Rated 1 out of 5 stars

SuperDif, you're not alone here. After the eula I also get:
Firefox could not install the file at
because: Invalid file hash (possible download corruption)

Must be something on the site, because going back several versions, I get the same thing.
I have used this in the past with no problems, but now I can't find that downloaded working version.

This review is for a previous version of the add-on (