I downloaded and installed the C337 in FSX but the only aircraft choice is a bare white exterior texture (beautifully drawn by the way but still not too colorful). Should there be standard paints available or do I need to download repaints?

There are several paints...check the aircraft.cfg file for the list

In the "Aircraft Select" box, at the bottom, make sure that "Show all variations" is ticked. Otherwise you only see the main paint for each aircraft.

Thank you Pete. It was the 'show all variations" box that was the problem...I never noticed that one before.

Welcome. It's easy done, especially when you have lots of aircraft installed.

 

Have a great flight ...