how can i open supersu in terminal emulator? or at least find the app icon?

cant get to supersu on my sch-s968c s3. i installed from the play store, uninstalled, reinstalled, flashed with flashify, nothing worked. i tried twrp but it wont even see the zip file. any ideas? no grant or deny access pop up either. was thinking of trying to open in terminal emulator to see if i can hide/unhide icon somehow