How do I remove a SecureDNS exclusion?

As part of CIS install, I was offered the option of switching my DNS servers to use Comodo’s SecureDNS to block access to malware sites. I recently visited a site, and received a warning about a possible malware infection on that site. i told it to allow me through anyway, but now I need to remove the exclusion, as the site owner has requested a screenshot of that warning message.

There doesn’t appear to be an exclusion within CIS anywhere, so how do I remove the exclusion?

EDIT: using SecureDNS server IPs is also causing the same site to not display correctly, and removing pretty much all functionality. Changing to other public DNS servers completely resolved this problem. This seems like a bug, and the site seems safe. Should I post relevant site links in the safe site area, and reference this post?