You'll need to buy two licenses, in order to have 2 usb sticks.
With one usb stick you can run cubase on more than one computer, but not at the same time, and you'll need the usb dongle plugged on the computer that it is running cubase.
My SongsWilfredo Nanita
Windows 8.1 Pro 64bits • Intel Core 2 Quad 2.4GHz • Ram: 8GB
Focusrite Scarlett 8i6 Audio Interface • M-Audio Axiom 61 Midi Controller
M-Audio DMP3 Dual Mic Preamp • Yamaha HS 50M Monitor Speakers
Toontrack Superior Drummer • Cubase 7.5 - 64bits