I cannot install downloaded scenery

I follow exactly the instructions Fly Away is giving, but when I select the scenery from the Addon Scenery folder and I click OK, the scenery path is laoded into the "Look in" bar, but the "directory" bar becomes empty and the screen is not closing. There is no way I can get the screen closed other than by cancel or by clicking the cross on the right top and then by scenery is not added. What am I doing wrong ?

Same problem! I'm not sure why this is either. Sorry I can't offer you any help.

When you have the correct scenery selected in the window, then you click OK, does the window now show what's inside the scenery folder you selected? If it does, at that time right click anywhere in that window, besides on top of a folder.