Update(02/02/2015): Starting from Ubi 3.0, you don't need to change the display scaling to use Ubi. Please always update your Ubi to enjoy the latest improvements on the software. If you have question or problem updating Ubi, please contact us firstname.lastname@example.org
For Ubi 2.9 and below:
You need to follow the steps below to turn off the magnification effect when connecting to a projector. Another problem these instruction may help with is unsupported resolution.
1. Mouse right click on your desktop and select "Screen Resolution"
2. Select "Make text and other items larger or smaller"
3. Check the "Smaller – 100% (default)" radio button and click "Apply"
4. Sign out and relogin to your account again.