Hi Kissling,
Sorry, I'm no longer working on that project. However, I will tell you that I had to rescale the backgrounds using Photoshop to natively fit my relatively low resolution Lenovo all-in-one PC on my mill. I used a combination of Photoshop, Illustrator and Machscreen to design/create/modify all of the other graphics in the UI.
I would try adjusting the UI in Machscreen since you can adjust the placement of the graphics/buttons/LEDs/DROs if necessary.
I hope that helps.
Good luck!
dotyman