Emulator Problem: nesterJ tell me is corrupted plz prety plz help me

[copgusher]

i instaled nesterJ and Snes9 and both of them tells me its corrupted i dont kno why im new at this emulator downloading thing so i really really need your help i dont have money to download real games so im really hoping fo this to work so plz be as most generus and help a stranded kid ty