if its a false positive it should be solved in the next updates of the antivir... so update it asap...
on the other hand my avira is not detecting anything wrong with CF, but i disabled the heuristic years ago and it got updated ths morning
if after updating you still get the same reports, you can wait some days till a new update is released.
anyways, to be sure thats a false positive, you should check that file with other antivirus and see if they see it as a virus or not
there are some that can be used online so you dont need to download and install it...
you can also use www.virustotal.com, where you can submit the file and it will be scanned by several antivirus engines