how to manage list of trusted installers?

In file rating, I turned off trusted vendors, but I still have trusted installers enabled.
How can manage the list, or at least, how can I view the list of trusted installers?
I have no idea who I am trusting…

There is no specific list of trusted installers. Trusted installers are either trusted because the company is in the Trusted Vendor List or because the individual installer is trusted by cloud look up. So you need to disable Cloud Lookup as well.