GGCO - Sorry for the confusion. No, you don't have to own EasyC. What you need is a copy of the C18 compiler and the WPI Lib(assuming you want to use Brads library).
So if you want to, download the student edition of Microchips C18 compiler
here, and then download the WPI Lib
here. You should still be able to follow that tutorial, just changing the file paths to wherever you install the software.
One note though. Even if you just get the trial of EasyC, I believe the C18 compiler still works after the IDE demo expires. So alternatively (probably easier) you could download the trial of EasyC and just follow the tutorial.
Short answer - No, don't need EasyC
