Why is shift no longer providing me with proportional scaling? Also, my other commands (like Control R for the registered trademark sign) aren't working either. What can I do to fix this? Designing shouldn't be this frustrating, especially since I haven't done anything to the program.
That often means that the system or third party plug-ins (often for Chrome or Firefox) are conflicting with your keyboard shortcuts.
Reboot, and start loading InDesign first and see it solves the problem.