Log into the admin console directly using your administrator account:
http(s)://HOSTNAME:PORT/navigator/?desktop=admin
This will bypass the default desktop and get you into the controls again. You should be able to adjust the permissions back from there.
Note: the admin desktop for ICN has known issues when running in a browser that is launched with RunAs. It works best if you log into the machine with the admin account directly and launch the browser as normally that way.