If you have already upgraded to ArcGIS Pro 2.0, you may have noticed that your recent projects aren't listed under 'Open a recent project'. If you haven't upgraded yet, this will be a handy piece of knowledge to get you going.
There were some changes to how the user configuration (user.config) file is stored that lead to this, but don't fear, it is easy to get those to show up again. Follow the steps in this technical article:
Problem: After upgrading to ArcGIS Pro 2.0, recent projects do not display under 'Open a recent proj...