There is a fundamental issue here that has not been addressed. The hacked version was signed with the Piriform private key was it not. If so, the hackers had access of that private key. Either this was an inside job, or Piriform was compromised to the extent that the hackers got access to the private key. Either is catastrophic. A more plausible scenario: This wasn't a hack at all, but instead a intentional move on Avast's part to collect configuraration data. All bad! Won't be using it anymore... uninstalled.