Resetting the Ribbon usually fixes this.
– Right-click in the blue area next to the menus. Click “Customize”.
– Click on the Ribbon tab.
– If you have customizations, you’ll want to Export them before resetting.
– Click the Reset button.
– You may need to restart PC-Crash.
You can reload your customizations with the same Import/Export button in the Ribbon Customization window.