mallomar, i suspect it is a false-positive… it seems that lots of people are getting “Win32:Evo-gen [Susp]” false-positives this morning…
i don’t know about the avast-free program, but, with the avast-pro program, on the “support” tab, there is a utility, there, for submitting files to “avast” (without first having to quarantine the file)…
assuming that it is a false-positive, you wouldn’t want to quarantine the file… i mean, if it was me, i always verify that a file actually is malware before i allow it to be removed…