I'm running FF version 28, and I find on three of my desktops running the free version of Avast that the setting button triggered by clicking on the Avast styled @ is grayed out. Clicking on the My Avast button alongside, I can access my account with Avast, but flog the site as much as I can reasonably do, I cannot find a way to disable Safe Price from any of my machines. What is extremely frustrating is that I carefully install the Avast software paying attention to what is added to my account. I never see the Safe Price option, nor can I find in the install package where it is nested. I also tried the click on the question mark ploy which used to work, but the choice to remove Safe Price is no longer there.
I have used Avast for years and have been well satisfied, but I have to say that Avast's implementation of Safe Price smacks a bit of under handiness. It should not be such a detailed task to get rid of something like Safe Price if you do not want it. Come on Avast...