Exacta,
I initially let the program update itself from 8 to 9, and then to the subsequent 2007 patch.
In my case, the Deep Screen process didn’t work anything like how it should, and I finished up:-

  1. Uninstalling the program using avastclear.exe in safe mode.
  2. Using RejZoR’s Avast Clean up tool
  3. Doing a clean install of Avast 2014.9.0.2007

Everything now seems to work nicely. including the Community setting being remembered.
Perhaps it is worth you considering that option.