If every user sent all the files that AVAST has reported on our PCs at some point as a "Threat" the service would likely be deluged. How long do we have to wait for a response anyway?
If you're trying to do some work and have to wait even just a few minutes to confirm a file is OK that is annoying and does it even solve the problem? Does the file's reputation get updated immediately allowing the download to proceed or do you have to wait for the next definitions update?
In this case the excuse for blocking the download appears to be due to it being a rarely downloaded file. Been there, seen it and bought the T-shirt
I've had this sort of thing happen to me many times in the past simply because the download's rarity makes it, for some reason, suspicious.
There are gaming related tools I've tried to download which are probably now only of interest to a couple of dozen people worldwide and once downloaded are not required again. So of course they are increasingly rarely downloaded but that does not make them suspicious.
I know it is better to be safe that sorry but isn't basing any default blocking on rarity alone going that little bit too far?
The solution in this case, I suppose, is to wait for the false/positive confirmation but if you want to take the risk you can probably override the blocking by altering the Web Shield and possibly some other Shields Settings from the default Abort connection to Ask as the action for anything "Suspicious".
I'd urge you to return them back to the default settings afterwards.