I can't get Scratch 2.0 to open. Every time I try it opens with the archive manager. I have checked the “allow executing file as program” box, but it still opens the archive manager. I also can't open the Adobe Air installer.

Something is wrong with your file, or it can be your computer. I have no problems yet with My browser / operating system: Windows 7, Firefox 38.0, Flash 17.0 (release 0)

Yes, however I have a different operating system than you.

wait, are you trying to use .exes on a linux OS? install winehq to use those.