Ratings scan -- how to add to trusted vendors list?

I see people saying here that you can delete the entries from the Trusted Vendors list, and then use the ratings scan in CFW to add back the vendors you use.
How to do this?

I’m not sure it would work as the rating scan only scans autorun entries and I think the system folder. Your best option would be to use the add function and choose either read from a signed executable or read from a running process.

It does work but Lookup tends to be unreliable and it’s pretty much limited to running processes. Before attempting to remove all vendors from your list, take some precautions: disable Auto-Containment, HIPS. Do note that it may take a while to remove all entries on some systems.