Qt creator won't recognize Qt library

[Violet Giraffe]

Greetings!
I have just installed Qt 4.7.3 and then Creator 2.1-84 (aka 2.2 RC). I've never installed Qt on this machine (Win 7) before. Strangely, Creator says: "No valid Qt version set. Set one in Tools/Options" when trying to open .pro. However, it does succefully recognize the Qt version from PATH if you look at options/Qt. I've also made sure that QDIR and QTDIR env vars also exist.
Any ideas?
Thanks in advance.

[mvuori]

I'd try rebooting the PC if you haven't done so yet. My copy of QtCreator 2.2 behaved badly after installation on top of QtSdk 1.1 and would not recognize Maemo stuff being such until I figured that perhaps a reboot would be needed. And it was.

[Violet Giraffe]

I'd try rebooting the PC if you haven't done so yet.
Sure did, no luck :( Also reinstalled both Qt itself and Creator a number of times.
Please note, I'm using Qt 4.7.3, not SDK.

Perhaps, configure could help. Have to try that...

[Violet Giraffe]

Solved - configure helped