VS Add-in: qtappwrapper does not unload

qtappwrapper is still active, when all QT Programs and DevStudio close.
Now, when I again start (login from terminalsession on Win2003), and i.e. double click on a form file (ui), the designer is started on another session !

Example:
I login to win2003 , start devstudio and work with VSaddin 1.1.2. End the work, close all programs and let the session alone.
now go to another pc, start a terminalsession with same login, start devstudio and try to work with the AddIn, but when I start any of the Programs with doubleclick on a form file or from the qt Menu of Visual Studio, these programs were displayed on my first session and not in the session I work with.

Problem is, that qtappwrapper does not end, when Add in is unloaded (when VS is closed).

No other user was active on the Win2003 Server (we are a very small company), I checked it with Task Manager.

And it must run in the same session to have the Addin on the correct session.

I work on more version (4.5.2 and 4.6.0), I must be able to have the AddIn programs on the right session.

Same is with different user names, when i.e. a user "user1" is logged in in session 1 and "user2" is logged in on session 2, both have Visual Studio 2008 open, and in task manager qtappwrapper is started on session 1, the user on session 2 will find his AddIn designer in session 1 !!