Lightroom 4.2 vs cloud

Question

I started lightroom 4.1 and it tells me there is a 4.2 upgrade, click here to download.
Why don't I find out about the upgrade from the usual Adobe update service? Who knows man, who knows.
Anyway, I download it and install 4.2.  It leaves 4.1  lying around apparently. I uninstall 4.1.
Now 4.2 is asking me for a serial number. I put in my creative cloud serial number and NOPE.
Meanwhile Adobe Application Manager lists only lightroom 4.1. No 4.2 in the list. Doesn't exist I guess.
Boy was I stupid to think a gazillion dollar  a year company like Adobe could actually create and deploy a suite of applications that actually work and communicate with each other. I still can't even update my billing info because "there is an error in the store." Do you guys even know what day it is over there?

Answer 1

Have you been able to update your billing info?
Most of the applications are updated using the Updater piece of the Adobe Application Manager (AAM). Lightroom is an exception but as noted will let you know if there is an update when launched.
4.2 is an update to 4.1, not a replacement for 4.1. Have you been able to resolve the problem?
If not then at this point run the Adobe Cleaner Tool which you can get from here http://www.adobe.com/support/contact/cscleanertool.html. Then you will be able to install Lightroom again using AMM, and finally update it to 4.2.