Shoutbox

I'm using Messenger Plus! Live's auto-accept feature to accept a series of .rar files from someone.  Unfortunately, there's a nagging popup warning me that it is a potentially unsafe file and prompting me to continue before accepting the download.

I poked around for a couple hours for a solution but couldn't find anything current.  Most suggested fixes were for much older versions of the software and did not work.

Any help on how to get around this?