The cog icon, hover cursor over it to open settings tab thing. In the top of the settings tab thing: The paper icon with red arrow down, is save. Click to save whatever you have made, it will make a new file that you can rename if you want. The paper icon with green arrow up, is load. Click it and it will have you browse through your files on your computer. Any files saved from flipanim will have '.flp' after the name, as the file type, choose those files to open if you wish to continue that animation. This is also how people do collaborations, by sending each other the files through email, discord, etc.