AVR Studio 5 Available for download.

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Direct download links. No need to register.

NOTE:
AVR Studio 5.0 cannot be upgraded from its beta versions. Please uninstall any beta versions of AVR Studio 5.0 from Add/Remove programs and reinstall.

AVR Studio 5 installer (includes VSS and .NET)
(602 MB, revision 5.0, updated 5/11)
This installer contains AVR Studio 5, Visual Studio Shell (Isolated mode) 2010 and .NET 4.0.

Select this installer if you need all three or are unsure of what installer to use.

http://www.atmel.com/dyn/resources/prod_documents/as5installer-5.0.1163-full.exe

AVR Studio 5 installer
(387 MB, revision 5.0, updated 5/11)
This installer contains AVR Studio 5 only and requires that you have already installed Visual Studio Shell (Isolated mode) 2010 and .NET 4.0.

Select this installer if you have installed AVR Studio 5 beta already and only need to upgrade.

http://www.atmel.com/dyn/resources/prod_documents/as5installer-5.0.1163-small.exe

AVR Studio 5 - AVR Software Framework Update
(228 MB, revision 2.6.0, updated 7/11)
AVR Software Framework update for AVR Studio 5.

http://www.atmel.com/dyn/resources/prod_documents/AVRStudio5-ASF-Update-2.6.0.21.exe

AVR Studio 5 - AVR XMEGA AU Part Support Pack
(44 MB, revision 1.0, updated 7/11)
AVR Studio 5 part pack for all AVR XMEGA AU devices

http://www.atmel.com/dyn/resources/prod_documents/AVRStudio5-part-pack-installer-AVR_XMEGA_AU-0.1.73.exe