looks like your computer is messed up big time with paths and different versions of qt and/or related software...

i recommed to uninstall the qt sdk and the visual studio addin...

then manually delete all the changes you have done to your envirment variables... (PATH, QTDIR etc)..

delete the directory of sdk and visual addin(if not removed by uninstaller).

restart computer

install qt sdk first
run visual studio
kill visual studio
install vs addin.

restart
run studio

i dono what will happen