Crashes with "Back To Top" Rated 2 out of 5 stars

It crashed with my "Back To Top" add-on. I have to click once on the page before the "Back To Top" button could function. The button could not operate normally like before even after I uninstalled this. Seems my "Back To Top" files are corrupted. It would be a great add-on if it could get rid of such petty annoyances.