the my projects page is where you can select which project you are to work on, the project you were last on usually saves.
my Project ButtonsEdit
On the my project page there are several buttons for managing your projects, there is an add and remove button for adding or removing projects. There is also a "more actions" button where you can download or upload the source code for your app
Getting to my ProjectsEdit
To get to the my projects page there is a button on the top op the screen, on the my projects and design page, it is towards the left corner, on all the rest of the pages the link is on the top right corner.