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How to Delete the Postbox Caches Directory

1) Quit Postbox so that it is no longer running.

2) Remove the Caches directory, named "Postbox," located here:

Mac

<your home directory>/Library/Caches/Postbox
(Need help finding this folder?)

Delete the folder "Postbox".

Windows

<your home directory>\AppData\Local\Postbox
(Need help finding this folder?)

Important: Make sure you are navigating to AppData\Local and NOT AppData\Roaming!

Delete the folder "Postbox".

3) Restart Postbox.