Hi there,
We've tested the downloader with multiple different antivirus solutions which haven't found any issues with it - we're confident that this is a false positive being reported by Avira. Due to how viruses are detected these days, the chance of a false positive is relatively high, so I assume the latest version of the downloaded just happens to look similar enough to a certain virus for Avira to freak out about it.
I've submitted it to their "false positive" update service, so they should be able to remove this from their virus listings soon. I'll post in this forum when we hear back from them.
Thanks for your report!