Not most recent version

Moved to Installing Flash Player.

If you want to install a version older than the one currently installed, you'll need to first Uninstall.  This is a security measure that prevents malicious sites from downgrading you to a vulnerable version of Flash Player.

In terms of specific download that's stale, it takes a while for changes to propagate out to all of the content distribution nodes on Akamai.  You may have just hit a stale note.  That should definitely have cleared on it's own at this point.  If you're still running into it, we'll need to manually intervene.

If you continue to see the issue after refreshing the page, specifically which content debugger download are you running into the problem on (Mac, Windows Active-X, Windows Plug-in), and where are you located (US, Europe, etc)?  If you could right-click and choose copy link on the specific download you're having problems with, that would be the ideal level of detail.

Thanks!

you have to manually remove the old release first

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html