If you want to delete your online account and use the offline license instead, you can proceed 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: Show app info.
   
• The app info pane becomes visible.
   
•  Press this button on the app bar of this pane to display the list of secondary commands.
   
• Select the command: Delete account.
   
• You will be asked again if you really want this. With the account deletion you automatically switch to the offline license. However, you can switch back to the online license at any time when you create an online account.