Hi.

Can you give more details on how you got into this state:

• Are you editing the default tilesheet that was created at project initialization, or another image?
• Do you have the image opened in another software?
• Did you made any changes to the project settings?
• Can you open the developer tools (View > Toggle Developer Tools) go onto the "Console" tab if not already selected, and tell me if you see any logs or errors in there?

The map editor does work.

My computer isn't a touch screen device.

I place pixels on the sprite editor, and the changes do appear, though only in the window of the sprite editor, not on the tilesheet. Furthermore, when I click on another tile on the tilesheet, no changes are applied to the previous tile, and the new one simply gets loaded into the sprite editor, and it can't be edited either.