Today I upgraded to Yosemite and am looking for app updates.
This app along with all their other apps were discontinued by the developer.
Thankfully, AutoPurge opened right up in Yosemite and is functioning normally.
There are several free up-to-date apps in the MAS that do the same thing, but I like AP's features. Some of the others require you to monitor performance and click a button to free memory when necessary. Why should I do that? That's the app's job!
I set AutoPurge to free RAM every 60 minutes, and never have to think about it.
Some free MAS apps are FreeRam Booster 2, Memory Monitor and Memory Clean.