You've most likely recieved a pirated copy of ArtCAM, as it's only available now with a subscription from Autodesk.
ArtCAM Premium, the new name for ArtCAM Pro, is now $3000/year. - Autodesk ArtCAM; software for engraving and sign making
ArtCAM Standard is $360/year - Autodesk ArtCAM; woodworking software for 3D reliefs, decorative woodwork and CNC machining
How easy it is to use depends. Some features are simple and easy, and some take a lot of artistic skill.