can't install application on mac exit code 9 : already installed

Hello,

This happens for the second time : the application cant get installed on mac os.

Logs reveal an error type 9 : application already installed, according to an old post on these forums.

It doesnt appear in Applications, as I can see, and Spotlight cant find the application either.

The point may be that an standalone version may have been installed once (and probably removed since it does not appear) but the customer cant remember that.

Is there a mean to remove all air application and stuff ?

TIA,

Thomas