In case you want to share the design with friends or moving to another computer.
Just export current design and import them on another computer.
Go to menu File > Save as file
This step will save all your design data into a .json file. Notice does not change any content on that file, may that action break down content
You have a .json content file. Just go to File > Import Design and select your file to be ready for import. The content auto loaded into design area after select file.