Stupid question - loading correct TFT library?

Sorry for the complete n00b question... I have a Mega and a Seeed 2.8" TFT TouchShield v1. I'm trying to use their demo sketch to get started, but it keeps loading the wrong Tft library:

Multiple libraries were found for "TFT.h"
Used: /Applications/Arduino.app/Contents/Java/libraries/TFT
Not used: /Users/Jason/Documents/Arduino/libraries/TFT_Touch_Shield_V1
Error compiling.

How can I force the IDE to load the right one?