QtQuick opening up multiple instances while suing design pane in Qtcreator

[shadabk92]

Hello,
I am trying to use the QtQuick to design my application on the Ubuntu 12.10LTS (32-bit) (non virtual)OS, and it is starting multiple instances of the design window and hence piling up in my memory that makes my whole system to crash and also makes the Qtcreator or Qtdesigner very slow in operations.