Newbie needing help please!

Hey everyone! So I started work at a metal fab shop in January, helping in the office. Printing drawings and taking orders from customers and getting it to the shop. Now I'm also in troubleshooting and I have no idea where to start. We have a Plasma-cam 510, and run Design Edge software. This has been the setup for years and has worked great. Something happened from last week to this week and not sure what. I've called tech support and that didn't get me very far. But I have double checked my measurements on my drawings to be sure they are what they are supposed to be. When we are cutting them out they are roughly an inch bigger than what the drawing is. Can anyone point me in the direction of what to check next? Thanks!