The specific steps for uploading the code:
1. Select the type of Arduino board that you are using by the path: Tools --> Board --> for example, Arduino UNO after you have open a demo. 
It may be your wrong choice of board type If there appears the below image, please re-select the Arduino board that you are using.
2. Select the correct serial port you are using by the path: Tools --> Serial Port --> for example, COM3.
3. Upload the demo code as below show:
When there appears "Done uploading", congratulate you upload successfully.
Copyright (c) 2008-2016 Seeed Development Limited (www.seeedstudio.com / www.seeed.cc)