RobotC Graphical Editor Font Size Messed up?

New to VEX IQ, please let me know if there is a better place for this type of question. I’m helping some students to start their RobotC programming. For some reason, we couldn’t get the graphical editor to work, the font size is all messed up. I’ve gone through all preferences (in both Basic/Expert mode) and reset all registry keys, still to no avail, any idea or suggestion is highly appreciated!