For the different verions: Is your standalone version of Flash Player the same as your browser one? When you select "open in (flashdevelop) tab" it uses the ActiveX version, when you select "Open in Window" it uses the ActiveX or Netscape plugin depending on your browser. When you chose the default "play", it'll play in the standalone version of Flash Player.
All 3 of these can be different versions. Also note that when you use the standalone version, Flash will select the last one opened. E.g., if you have 2 standalone exes on your computer (say 10.1 and 10.2), whichever was the last opened is your default - so just open whichever one you want to use.
All that said, your problem is your JSON feed :D
It seems you have a token wrong, but without the feed, it's hard to say more