windows 10

So, first off, I have 2 lasers that run off my one computer. An Epilog Legend 36 EXT and and an Epilog Zing 30 watt.  The Legend works just fine but I have found that for some reason with the Zing my artwork is getting compressed. For example - I'm lasering a plate that is 8" wide by 4" high and when it's lasered comes out 7-1/4" high by 3-1/4 high. I tried shutting the machine off - restarting CorelDraw ... I'm just not sure where to go or look to try and fix this.  Anyone have any experience with this?? or am I just nuts!