To move multiple projects to a folder:
From the Dashboard page select My Projects in the left side menu
Select the projects you wish to move to a new folder by hovering over them and selected the circle in the top right corner
Select however many projects you wish to move
In the top menu an Arrow icon will appear, click this icon
An Add to Folder box will open with all your folders in it
You can either select and existing folder or create a new one
Then hit Move to Folder in the bottom right hand corner and your projects will all be moved!