Avast 4.8 is effectively unsupported, no idea why you would be still using this antique. I rather doubt there are many in the forum that have used it in the dim and distant past. There are a few exceptions, mine being one. If it was sent to the virus chest there is/was an option to send it to Avast for analysis from within the Virus Chest.
It could simply be a conflict between what is another security based product.
Could it also be that this Anti-Ransomware Tool is also very old.
Posting multiple topics on the same thing won't get it answered any quicker, just having duplicates removed.