The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
3D Viewer Beta update (Oct 20, 2016)
A new update to 3D Viewer Beta was released to the Store on October 20, 2016. The app version number is '1.1610.1212.0'.
This release contains bug fixes and a change in the scale control, back to the drag & drop model.
I'm a Microsoft employee and a member of the HoloLens team, however I do not always speak on behalf of Microsoft.