Hello, I was experiencing the same problem, with the Download Error message on CC App tab. I contacted support and the issue is solved (on a Mac Book Pro running OS X 10.8.5). The steps I followed are: Close Creative Cloud Application (up right corner, click on the cog menu and then "Quit Creative Cloud"). From Finder, click Go > Go to Folder. Type ~/Library/Application support/Adobe and hit return. Rename the folders 'AAMUpdater' and 'OOBE' to 'AAMUpdaterOLD' and 'OOBEOLD'. From the Finder, click Go > Go to Folder. Type /Library/Application support/Adobe and hit return. Rename AAMupdater, AAMupadaterInventory folders to AAMupdaterOLD, AAMupadaterInventoryOLD. Launch your Creative cloud desktop. Introduce your CC credentials. Select install/update applications. Hopefully it will work for you. If it does, then you can remove the folders that you renamed as <something>OLD. I assume that for Windows users it should be possible to do something similiar. If someone is able to reproduce it please post it here for further reference. Thanks!
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