If no menu appears with a right-click you should try re-setting the r-click.
Hit ALT + F11 to go to the VBEditor.
Then View>Immediate Window.
Copy/paste this line into the window and hit
Application.CommandBars("Cell").enabled = true
OR copy/paste this sub to a module and run it.
Sub reset()
Application.CommandBars("Cell").enabled = true
End Sub


