Hello!
Thanks for your reply.
I will try to make myself more clear.
The update setting that I refer, is related to the time interval used by avast to submit information to my avast website. Its not related to the update of the program or virus definition.
In version 2014, this setting was available in the Account Tab of the settings area. Together with the inputs of email / password of the account you want to be connected.
Now, in version 2015, you only have the inputs (textboxs) of email / password of the account you want to be connected.
Thanks for your time!