JP- when I unzip a scenery it often puts the folder with the scenery data inside a folder with exactly the same name. If you put this "folder within a folder" into your Landscape folder, Condor won't recognize the scenery. The fix is to just put the innermost folder into the Landscape folder.

When you purchase a glider you should have received an email with the license key for activating the glider. Choose the ASK-21 in the Hanger and there should be a button on the lower-right of the screen that says "Activate". Click it and a pop-up window should ask for the license key.

Good luck,
Larry