There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read how to get help
I keep learning something every day - the default key combo for opening the bottom menu is Ctrl-SuperL , wehre SuperL is the Windows Start key on most keyboards. You can change that combo by right clicking on the Menu button and choosing preferences.