This is the content of a vanilla Orbiter Beta (Rev. 43) folder:
Match yours with this.
If you want, you can move (as Urwumpe and Martins said)
your misplaced textures folders into
Orbiter's "Textures" folder.
After doing so, you'll still have some out-of-place folders in your Textures folder (namely, EarthLo, Earth_Cloud, MoonLo and MarsLo).
These folders' content will presumably be:
- Textures
-- Planet_name
--- Cloud
--- Elev
--- Mask
--- Surf
You may or may not have ALL those folders, but you'll have to move all those Textures into Orbiter's Textures.
This is the content of the "Textures" folder, as it should be.
---------- Post added at 14:21 ---------- Previous post was at 12:20 ----------
Next, delete that D3D9Client you have in your Orbiter's folder. It's not the right version.
Download this one instead:
http://www.orbiter-forum.com/showthread.php?p=520444&postcount=3273
Move it into your Orbiter's folder, right-click it, and select "7-zip -> Extract here". Say "yes" to overwrites.
When you have done that, you can delete your "D3D9ClientBeta13c-forRev43.zip".