Can't compile Xcode 4 "modernized" project on Xcode 3.2

I have recently updated my Xcode 3.2.4 to Xcode 4.1. v4.1 got installed on 开发者_如何转开发/Developer folder sending my XCode 3.2.4 to /Developer-Old folder.

After v4.1 installation, I "modernized" my project on v4.1, but decided to stick with XCode 3.2.4 for now. When I try to compile my "modernized" project on XCode 3.2.4 I keep receiving the following error on all my XIB files:

This version of Interface Builder does not support documents of type "Interface Builder Cocoa Touch Document (XIB 3.x)" targeting "iPhone/iPod touch".

Any ideas? Is it possible to reverse the changes that "Modernize" action did to my project? Or how can I compile the project on Xcode 3.2.4?

Thanks!

Older versions of software do not support new versioned Documents. So the way Xcode and Interface Builder handled their files are going to be different.

I ended up uninstalling both versions of XCode (3.2.4 & 4.1) and installing XCode 3.2.6 on Lion(was only available for download on DevCenter from v3.x). This link helped me much.