Help! How to change xcode4 the developer account?

I installed xcode4.2, want to download the old version of the emulator, click inside the downloads to install a pop-up screen to let me enter developer account, not the result I entered a developer account apple id, then found tragedy can not change the account for other developers, and later point install, always prompt xxx @ xxx is not a registered apple developer. Reinstall xcode numerous times and found no use, help ah!
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Keychain management is not recorded in the AppleID, you can clean up, but it should also be introduced into other people's profile in the Organizer's Developer profile. I have not tried, just to give you a suggestion
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Has introduced another profile, but to no avail.
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Very good
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Why not change it? I often change back and forth three accounts ah ...... < br />
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Because I chose to remember the password, and account number, though not the developer account, but it is the correct apple id, and the password is correct, it is not changed. But thanks to eyodo8, I have found the key, delete just fine in the keychain management based on modified date!
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Deleted key to reinstall xcode it? I deleted without reloading xcode, or not ah