QT Designer --- Designer.exe is Always crashing whenever I start it, the crash is also related to a call to QtCore4.dll , Any Suggestions?

Question

I am a newbie who is trying to use the QT creator, I installed the latest version "qt-win-opensource-4.5.1-mingw". Everything was working fine except for launching the QT Designer .. I don't really know what is the exact problem .. but whenever I try to edit my project visually or even to launch the QT Designer itself, the windows pops up an error message in which it mentions "designer.exe has stopped working".

I tried to debug with visual studio and the problem was in some steps for calling some DLL functions but I didnt really understand what was going on.

Answer 1

This usualy worked for me

1. Uninstall QtCreator and other Qt versions.
2. Look for any Qt / Trolltech / Nokia keys in windows registry and remove them
3. Cleanup Qt directories
4. And then Install your IDE

Almost everytime i upgrade Qt Creator there are some problems with it if id don't remove older version.