When system is failure, request by customer 
GW Instek. When the system fails, firmware 
can requested by GW Instek customers. 
After plugging in flash drive, the corresponding 
symbol appears in the status bar. 
Press System button; 
Press F3 (Setting) button; 
Press F4 (Upgrade) button); 
Rotate the scroll wheel to select corresponding 
file; 
Press the F4 (Recall) button and start to 
upgrade; 
The procedure is done when the message, 
upgrading successful, shows up.