• Open the Menu with ESC, START on controller or the Home icon by mouse
  
• Click on the image icon appearing over the Non-Smoking sign
  
• Search and select the image
  
• png and jpg are supported

• Open Claw Machine Sim
  
• Press ALT + TAB key to go back to the desktop
  
• Find the .png or .jpg file you want to import
  
• drag and drop the file into the opened Claw Machine Sim game

This is easier if you put the game into windowed mode or have multiple screens.

• Open the Menu with ESC, START on controller or the Home icon by mouse
  
• Click on the image icon appearing over the Non-Smoking sign featuring a trashcan
  
• aaand its gone

The image is only stored locally and not synced with the cloud. It is stored in the games location in the following folder: Claw Machine Sim_Data/imported image cache