The Kniterate software automatically creates a draw-thread start when you add the start module. The draw-thread creates a clean and finished starting edge, and all you need to do is release the waste yarn from the main knit by pulling out the draw-thread.
Simply cut the last draw thread stich on the right side, take the longer end of the draw-thread on the left and gently pull it out of your fabric. To prevent the fabric from accumulating, it's easier to pull while pressing down on the knit to keep it flat.