Provisioning Profiles menu item missing from Xcode 5

After spending a whole day installing a fresh copy of Mac OS X v10.8 (Mountain Lion), Xcode 5, fixing provisioning profiles, certificates, creating new ones, I finally managed to get my applications running on my iPad again. The problem is that in Xcode 5 I don't have a menu item for Library - Provisioning Profiles, and I don't know what could have happened. I restarted the computer, tried some things, but I really have no idea what I could do. How can I fix this problem?

Xcode 5 organizer

Where are iOS provisioning profiles stored?

The default location is ~/Library/MobileDevice/Provisioning Profiles. You need to browse or navigate to the profile file when you sign apps with the signing utility in iOS Gateway.

These settings have now moved to Preferences > Accounts:

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If you like to manually manage your profiles (mostly to clean up):

Open Windows/Devices in Xcode 6
Select your device
Show Provisioning Profiles:
You'll get + and - buttons to add/remove profiles:

No longer supported ... you can also download Apple's iPhone Configuration Utility 3.5 for Mac OS X, it still has "Provisioning Profiles" and works with Xcode 5 -- it's now gone from Apples site but you can find an alternative download link in @suda's comment.