Hello!
1: Yes you can, the plugin commands are: DisableKoTCMinimap and EnableKoTCMinimap
2: That is one of the features that is part of the Advanced version of this minimap that I am currently working on, but isn't included in the basic version.
You see the entire floor immediately.
But in the next update I will implement a minimap icon visibility range into the basic version for those hidden objects.