See the release notes here
Download here
Update for 8.0.5.1 on 3/8/2017: We released a hotfix to resolve an outstanding issue, the change log from 8.0.5.0 to 8.0.5.1 can be viewed in the release notes listed above.
Update for 8.0.5.2 on 3/15/2017: Fixed a bug where fresh new installations of NinjaTrader did not get the latest version of the default instrument lists from the server as expected.