Hey!
Do I paint the plane in the livery, or choose it?
You choose it.
You can only choose liveries you have. And the library is a bit of a mess at the moment.
Select the plane you want to fly. Select the “Configure button” Inside you may or may not find other variants of the plane, select the variant you want to use. There is then a livery button. If that Variant has more liveries you’ll see a scroll bar for them.
Because the Library is using fields to sort the planes that didn’t used to be used, some of the planes and liveries are all mixed up all over the place because either the author didn’t fill them in, or did it wrong. For instance, if you owned any of the Carenado planes, Configure the first Carenado plane in your list, the rest that are missing will be in there.
Liveries are also a bit mixed up, too, as is the Variant list. Search around a bit in your library and you might find what you’re looking for. Unfortunately, the “search” command isn’t much help at the moment. For instance, if you type in Mooney, it won’t find the Carenado Mooney even though you have it.
Hopefully the Marketplace team either fixes the planes themselves, or force the developers to fix them (they require edits to the Aircraft.cfg files, which we can’t currently see or edit ourselves at the moment. Hopefully that changes).