I noticed an update for the PMDG NGX-737 posted in the download section,   it does not have a date on it,  does anyone know the release date for that download?......was trying to figure out if I needed that update.

Sorry, can't help you with the date for the download version, but the Aerosoft box doesn't require it.

 

To make sure you can download the SP and run the installer; it'll only continue when needed. Or check your version's release notes for any mentioning of SP1c included.