Known installers can by dragged from the trusted to the untrusded side or visa versa. An installer can also be removed by dragging it into the recycle bin.

Clicking Add Trusted or Add UnTrusted will let you brows for a file and add its icon to the accosiated list.

Hide Unneede Folders - Clicking this will cause DAI to scan your complete Daz Studio library and hide any folders that do not contain DAZ object files.