Grease/Tamper Monkey download problem

VaYank5150

Newcomer
I play this game on a laptop provided by my company. I just got a new Win10 laptop and am getting an error anytime I attempt to download Greasemonkey and/or Tampermonkey. Does anyone know if these work with Win10?
 

VaYank5150

Newcomer
Thank you, however, the email address given

Email: kontakt≺at≻tampermonkey.net

for support isn't recognized by Gmail?