If you want to save a game to a folder of your choice, you can do it as follows:

•  Press this button on the app bar of the game view to show the list of secondary commands. On a PC, you can use the menu of the title bar alternatively. This menu is more detailed than that of the app bar, so you can reach almost all the panes directly.

• Select the command: Manage game files.
   
• The game files pane comes into view. It shows the name, the comment, and the saved status of the current game
   
•  Press this button if you want to save the current game state to a folder of your choice.