The quickstart manual will get you up and flying quickly. A full manual is included with the full version of this add-on.
You can also download the paintkit and yes the textures will work on the demo.
The Globe swift is compatible with Version 4 of Prepar3d with the following notes
To install use the Prepare3d installer and point to the installation directory of Prepar3d v4.0.
Updates and upgrades will always emailed to the email you used to purchase.