Files can be added to the exclude list easily.
in avast simple user interface go to Menu>settings>exclusions
So... how do I make it so it only excludes on access, but not on write. Or is that only on access.
This would actually be a cool power-feature. For each item you exclude, they could have 2 checkboxes for "On Write" or "On Access", and you could select exactly which aspect you wanted to exclude. Right now, you can just "Exclude" and thats that from what I can see.
Nice feature idea, i'd submit it into the stick at the top dealing with "Suggestions/Requests".