Sparkfun SPI Shortcut

I got a SPI Shortcut and it works great. The only issue I had was it randomly restarting. Any ideas?

For example:

Enter hex string of 256 values or less. Press return when finished.
RR = Receive, CH = Chip Select High, CL = Chip Select /, DY =CL 10 81 CH
CS Low
Sent 0x10
Sent 0x81
CS High
String sent!

ACTIONS MENU:
(1) Send command string
(2) Send ASCII characters
(3) Continuous receive
(4) Return to main menu

/²/À->1



------SparkFun SPI Shortcut------

MAIN MENU:
(1) Actions
(2) Settings

->1

57600/8/N/1