I've been printing for months on this HicTop Prusa I3 and Cura 15.06.6. Today, suddenly, the prints do not print inside geometry. I printed a hinge with screw holes and recesses for nuts. The hinge printed without the screw holes or recess. Thinking it might be my design, I printed a logo from Thingiverse - same issue; just a solid print of the outline. I reloaded the firmware with no change. I tried downloading the new Cura 2.5 but it says my printer isn't installed and I can't find any instruction to install it.