It can be a false positive. Not saying it is at this point. It is just a possibility we are facing. Avast has just released vps 437-1. Make sure you have it at home.
Install the application and scan your system. Set Avast to do a thorough scan and enable archive scanning.
Do not only scan the folder the application is in, since it also may install/extract files in the windows or windows\system(32)\ folder(s).
This scan may take some time, but please do it. Write down the filename(s) and their location(s) if Avast finds anything. Also write down as what is detected exactly.
Take all files that Avast detectes as infected to Jotti. Let Jotti scan them and tell us the results.
Do as I suggested here and when we have the results, we take it from there.