QT-VS-Addin seems not install properly with VS 2013

Things I did:
+ Installed QT (using qt-opensource-windows-x86-msvc2013_64-5.3.1.exe)
+ I downloaded the QT VS addin (qt-vs-addin-1.2.3-opensource.exe) and
installed it...

What I think does not work correctly:

+ Visual Studio does not show the entry "QT" in the main menu bar
+ Under File->New->Project is no entry to select a QT Project

The only thing I noticed during the installation of qt-vs-addin is this warning:

RegAsm : warning RA0000 : Registering an unsigned assembly with /codebase can cause your assembly to interfere with other applications that may be installed on the same computer. The /codebase switch is intended to be used only with signed assemblies. Please give your assembly a strong name and re-register it.
Types registered successfully