How to stop Open RYL2 two times?

Hello dear,

can someone help me or show me to not open more than two clients?
Already tried in every way and I can not!
Thanks.
Good day!

Anyone?

use enigma protector
add checkup>executed copies

http://666kb.com/i/cw2v8pp6tkvpjgtjt.jpg

http://www.enigmaprotector.com/