I have a K40 also…in the device settings for LightBurn set the origin to the upper left corner and then go to your design page settings and set the orgin to the upper left. If you need to, create a new drawing with the page origin set to the upper left and then copy and paste the previous design into it.
normaly it always worked fine, how can i reset lightburn to standard, i also have a feeling its commng from firmware smoothie, because i needed to make a change to use rotary, …i think there is a new firmware for cohesion board 3d.
regrds
There are very few settings in LightBurn that would cause the machine to start somewhere else - Origin is about the only one - but you can do this if you like: