How to install QtDesigner?

I just installed Qt 5.4.1 on Windows 7. And there is no QtDesigner. Also there is no QtDesigner in MaintenanceTool.
How can I install it?

You can install and find QT Designer as follows (Windows environment):

• Install latest QT (I'm using 5.8) from QT main site
• Make sure you include "Qt 5.8 MinGW" component
• QT Designer will be installed in C:\Qt\5.8\mingw53_32\bin\designer.exe
• Note that the executable is named "designer.exe"

UPDATE - there is an easier way to install QT Designer without downloading GB's of data from QT:

• Install the latest version of "pyqt5-tools" using pip install pyqt5-tools --pre

• The "designer.exe" will be installed in ...Lib\site-packages\pyqt5_tools