Can I remove a reviewer after generating the files?

Yes. The stamped copies are generated fresh from your reviewer list each time you run the tool, so to "remove" a reviewer you just take them off the list and generate again. The new pack won't include them.

If you'd already sent a copy and want to revoke access, note that a downloaded file can't be recalled — but with ARC Delivery, links expire after 30 days, and you can simply not re-send. For the self-send Watermarker, control comes from who you choose to email.