Current X-Carve Pro orders ship with T-Slot wasteboard. However, earlier orders did not include the T-Slot wasteboard and you may have received yours separately.
If your order included the T-Slot Wasteboard, follow the assembly instructions. You will need to start the "Finish Setup with Easel" step, select your X-Carve Pro (4x2 or 4x4), and connect your machine.
After you have connected your machine to Easel, you will be guided through the wasteboard setup. Here's a direct link: Step 13. Finish Setup with Easel
If you have received your T-Slot wasteboard after assembly your X-Carve Pro, follow the link for the updated installation instructions:
If your X-Carve Pro is assembled but you want to set up an X-Carve Pro machine profile on a different computer, you can go to Machine > Set up new machine or follow the instructions here: Multiple Machine Profiles