Exporting selected audio as WAV
Use hotkey CTRL + ALT + C
Select the audio you want to export, then press the hotkey.
Details
Selected audio + hotkey popup
!IMPORTANT!
FL does not let you choose the directory to export to and will default to your project's root folder.
You will save to the wrong folder if your FLP is copied from an older project!
To fix this, you must set the root in your project settings.