BitTorrent and Avast [Win32:Evo-Gen (Susp)]

Today the free antivirus Avast reported my BitTorrent installation as infected with Win32:Evo-Gen (Susp). It also promptly removed the executable of the program. I tried to reinstall it, also to have the same happen to the installation program. I've reported a false positive (I hope it is) for BitTorrent Stable (7.9.8 build 42577) and then I added *bittorrent* as an exclusion pattern in Avast. I could then reinstall the program, retaining all of the settings and torrents in the download list.