This is a maintenance release. Has done nothing fancy but updating the Ogre source code and SDKs.
- Pulled the latest v2-1 Ogre source code: OGRECave/ogre-next@32ba36e
- Qt 5.15.2 msvc2019_64
- Visual Studio 2019 16.9.3
- Re-enable the D3D11 Render Subsystem.