[b]Info[/b] This update includes some major changes/optimizations to how worlds are loaded/saved, old worlds will automatically get updated to this format when you try opening them for the first time. (An automatic backup file will be made just in case). With these changes I managed to get a fairly big world from 40-50 FPS to 300 FPS on my hardware (Ryzen 7 1700/GTX 1060). [b]Major[/b] - Holding Shift when mining will force target floors only - Updated world saving/loading format - Optimized how chunks get disabled/unloaded/enabled. - Worlds will get backed up when going to the new format. Please let me know if you encounter any bugs/issues with this update. Since release the focus has been bugs/optimization but soon I will be changing the focus to some new features.