I haven't used Corel draw I ages...…………...so dumb questions arise...……..my tool bars do not show the "pen" tool. Where is it hidden?
In my X5, it is in a "flyout" in the Toolbox:
You can restore the default workspace f you hold F8 while the program starts, but you will loose your customizations (icons, shortcuts, etc)
If you have a lot custom interface, you can go to Tools/options/customization and add the pen tool