Saving Projects
No matter what you do - create a new project or edit an old one, you will need to save it so that all the changes were available in the future. Click the Save Project 
button on the Start Project page or use the File section of the Top Menu. The following window will be opened:
Select the location, enter the project name and click the Save button. The next time you need to edit the same project, simply open it clicking the Open Existing Project button or through the Top Menu.
In case you need to save the same project but under a different name use the Save Project as... option of the File section of the Top Menu.