Extension Manager, wrong Language?

Hello,

I bought the english version of Dreamweaver CS4 yesterday in the german Adobe Shop.

After Installation =

DW is english

Bridge is english

Device central is english

Extend Script toolkit is german

Extension Manager is german

Then I tried to install the AIR extension: Adobe_Air_CS4.mxp

I downloaded it from the US Site, so it should be the english version.

When I try to install the extension I get he message:

"path: ...\locale\en_US\ApplicationUpdaterDialogs.prop is used by Dreamweaver. Pls close DW and try again"

but that doesn't help.

I checked the mentioned path and found the file is not present.

But the file is in the path: \de\  for the german version.

Could it be the wrong Extension Manager?

I tried to install the english version, but that is not possible.

How do I install the AIR Extension?

rgds

Harry