The good news? There is a legitimate free version available. The bad news? It doesn’t look like a typical "free trial" link. Here is exactly how to get it safely.
Download the Demo version from the official site to practice designing. If you need to actually cut vinyl, buy the software license (approx $50-$100) or use the USB dongle that came with your machine.
Where to Download SignMaster CUT Basic (Free Version) & What You Need to Know