Hi Robin,
The FreeMASTER has 2 parts:
- the host PC application (the GUI that you see on your computer)
- the embedded communication driver.
Depending on the platform you have, the embedded driver might be different. The driver for MPC5744P can be downloaded from here: FreeMASTER Communication Driver
if you download and install the package you will find these files.

You will need to link these files with the rest of your project. Please check the readme.txt and you will find all the information how to do that.
Hope it helps!
Daniel