An update to version 4.3 is now available on the default branch. This fixes it so the editor is not DPI-aware and will be scaled correctly if scaling on Windows is used. Some small shadow update bugs were fixed, and the animation shaders were improved.
If you are having trouble running your game from the editor in debug mode, you need to install the latest VC++ redistributable from Microsoft found here:
The version distributed with Steam is outdated and will not work correctly. Valve has been notified of this issue.