MatterControl is a free, Open Source software package that lets you organize and manage your 3D prints. It’s designed to help you get the most out of your 3D printer – making it easy to track, preview, and print your 3D parts. Download it from Mattercontrol.com
In MatterControl, open the 3D Printer Setup dialog by and clicking the “Add Printer” button at the top of the screen. Or, from the top menu choose File -> Add Printer. Choose “Wanhao” as the make and “Duplicator i3” as the model. Click Save & Continue.
Follow the on-screen prompts to set up the i3, including installing the driver.
One thing you will need to change is the Fist Layer Height. By default the First Layer Height is set to 0.4. This should be changed to 90% (or 0.09 for a 0.1 layer height, 0.18 for a 0.2 layer height, or 0.27 for a 0.3 layer height).