This version of Strafe has significant API changes, which will require you to download .NET 5.0 Run time.  

The game should prompt you to go to a page where you can download the latest Microsoft Release.

Please bare with me in this.  There will be some bumps.  Further to that, there will be a move away from Sharpdx at the core of the DX11 pipeline to a newer .NET framework.  It should mean better frame rates on slower computers.

Side note: some additional bugs fixed in this release, such as the restart of mission always failing (when you retry a full mission again).

As always, happy to answer your queries.