I need to allow administrators to upload a specific type of file, such as .bat, .cmd, and others. For ordinary users need to disable it. How can i do it?
I dont believe you can - the only way to do it would be to add it as an authorized extension - upload the file then remove it from the settings after.
Looks like it may be going into version 2.0
Update, use the site setting authorized extensions for staff to add special authorized extensions for staff 