Unhandled exception on closing the file selection dialog

[4ingers]

Hi Matthew,

That's great you're supporting the 404sx community 12 years after the release date! :)

Talking about the problem: you can see it in the attached screenshot (printed exception message). It would be great if application would close when the file selection dialog returns empty string/null/undefined (at least that's what I expected as there wasn't SD in my laptop).

Btw I really like your ui taste, you created a very beautiful interface!

Cheers,

Alexandr