[Qt-creator] Bug in portable version of qt creator

[alpha_one_x86]

Hello, I try do portable version of qt creator, it can be downloaded at:
http://files.first-world.info/temp/qt-creator.zip
On clean system all work.
but on system who have Qt it try use Qt of the system but not internal
Qt, but use include of internal cute, that's do conflict version and
that's bug.
Can you help me to repair it?
Thanks.