The Next Generation Community Builder 2.0.1 is here
and it's free to download.
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Community Builder 2.0.1 is a maintenance release that fixes all issues (see discussion thread for detailed list) identified since the Community Builder 2.0 release.

I quick reminder for those that will be upgrading from a CB 1.9.1 environment:

• Unlike CB 1.9.1, CB 2.0 is now a single installable Joomla package that automatically installs component, modules and plugins
• Make sure your PHP upload_max_filesize parameter is set to at least 4M - see our Checking your PHP Settings tutorial for more info about this
• Check our Add-ons Compatibility Status page before you start and have latest CB 2.0 add-ons handy so you can upgrade them after your CB 2.0.1 installation
• Make sure that you have a full backup available before you upgrade
• If possible test your upgrade process on a cloned environment before attempting to upgrade your live site

Don't be alarmed by these steps as they are just precautions that you should really take whenever you do any upgrades on your live sites.

Enjoy this free update and discuss this on our forums.