Microsoft.office.tools.excel.dll detect virus of avast

hallo avast team
I just update database avast
avast suddenly pop up virus

not reported as virus … but suspicious. W32:Evo-gen [susp]

have you tested the file at www.virustotal.com ?

You can upload and report FP to avast here: http://www.avast.com/contact-form.php

you can also use mail

send to virus@avast.com in a password protected zip file
mail subject: False Positive
zip password: infected

or you can send files from avast chest
how to use the chest. http://www.avast.com/faq.php?article=AVKB21