ProShow is being discontinued. Instead they are offering a subscription model with a different name.
"Photodex is Shutting Down January 31, 2020
"It's always sad to say goodbye. After over 30 years, Photodex Corporation will be closing permanently on January 31, 2020. We're incredibly grateful for the opportunity to serve our customers over the last three decades."
https://photopia.nl/proshow/