Beginner problem with Files Tab

I went through the tutorial and created both programs there successfully. So I started on a new one from scratch. I created two different layouts with Designer and saved each one to a different filename ('Main' and 'EditCard'). I see those two files in the Files folder (each with extension .bal).

When I open the project after saving it, I am told it cannot create these two files because they already exist. I'm confused.

I see them in the Files Tab and see them in the Files folder.

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