upgrading Avast free antivirus

Troy Burnham

Hi All,
A window keeps popping up this morning asking me to upgrade my avast free antivirus, apparently to version 2015 although I thought I already did that earlier this year.  What is the easiest way to do this, or if I don't need to do this how do I disable this popup?  It has popped up several times already as I'm checking and replying to e-mail and I keep getting thrown out of what I'm doing if I'm typing a reply when the popup comes up.

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