I had xcode 3.2.something. and iwth ios sdks 3.0-3.1-....4.1 and 2 iphone simulator sdks.
Now i installed xcode 4.0 with ios sdk 4.3 something like that.
Now all my previous applications cannot be launched nor on device nor on simulator because there's not a single old sdk available.
so next i reinserted the original cds containing macosx and xcode and reinstalled the first xcode i used, but now there's not one ios sdk available at all.
i've been surfing the net for hours now, andi have a couple of questions: 1)have i had to uninstall the xcode 3.2.x before installing xcode 4? 2)how to uninstall applications on mac??? just to make sure that the answer i've found is the correct one. 3)how can erase the traces of all previous xcodes and their sdks in order to install the original one, now that i learned how to install different xcode versions side by side. 4) now what do you think i should to recover? do i have to back up everything and reinstall mac from the beginning?
thank you