Allow Non-Market Apps

I know that as part of the install, we are required to allow installation of non-market apps. But, do we have to keep that setting AFTER installation, or will avast! run ok if we change it back to default?

Its already installed so why woudnt it work as expected after installation?
That setting is only needed for installing apps that doesnt come from Android market.

I actually think you need it allowed for both installation AND updates of the Anti-Theft. So you can disable it no problem, but reenable it again when AT update is available.

Filip