I hid the robot c menu bar by going to a drop down menu, preferences, and hide menu bar. How do I get it back?
Maybe? Try that.
This happened to me awhile ago. The solution I found to fix it was to go through every key while holding control, and repeat while holding alt, then control+shift, then alt+shift, then control+alt+shift. Eventually I found the command to bring my menus back but I also found some neat tricks. For example, control+q is a really easy way to comment out whatever lines are highlighted onscreen.
Alt-F4 is my personal favorite command.
CTRL+SHIFT+ALT+M will display the main menu if you have completely lost it.