Clean Directory to match Manifest?

[ryantheleach]

Is there a way to get DepotDownloader to remove any files not belonging to a game?

I've ended up in a situation where my game directory has bloated out to 300gb, instead of around 70gb, due to an issue with downloading manifests before downloading the files causing DD to update the 'current manifest' internally and not removing old files.

I'm aware of -validate which can perform checksums, but does it remove files not matching the manifest?