Asymptote: 2.91 Released
By default, orthographic projections now use center=true; the camera and target are automatically centered within the scene. The surface constructor for triangles was fixed. A bug in the WebGL flatness test was fixed. Triangle group bugs were fixed and now produce compact HTML output. Triangle groups are used for indexed surfaces drawn with the render option tessellate=true. GLSL error reporting was restored. The reported camera up vector was fixed. The map module was fixed. A syntax warning in Xasy...
I've updated the documentation to point to pages 270-274 of https://www.adobe.com/jp/print/postscript/pdfs/PLRM.pdf
Yes, looking at the installer asymptote.nsi, you are right that we do register some keys. What I meant is that we no longer modify the user's path, since that may have unintended consequences and it is better for the user to choose where they want Asymptote to appear in their path, if at all. When you check the file type association, you have the option at the bottom to search for the correct application. I did this on my system long ago and you only have to do this once. If MiKTeX is calling their...
P.S. See Step 3 of this post: https://sourceforge.net/p/asymptote/discussion/409349/thread/909cd01735/?limit=250#f3c9/321c
For some time now our policy has been to not modify the MSWindows registry. A user is welcome to manually add the Asymptote path and other environment variables as needed. To associate a file with an app, there's no need to explicitly modify the registry: simply right click on it, choose Open with and select the desired executable. Most MSWindows users run Asymptote using the icon; there's no need for the installer to tamper with the windows registry.
Your video shows very clearly that you are running miktex-asy.exe. MikTeX has it's own packaging system and is known to have issues like this. Please remove all other versions of Asymptote from your system, including the third-party MikTeX one, and try again. If instead you want to use Asymptote from a TeX distribution, the TeXLive distribution is preferred over MikTeX for exactly these reasons.
The screen shot you show isn't from the official Asymptote installer. Please delete all other copies of Asymptote on your system and reinstall it from here: https://sourceforge.net/projects/asymptote/files/2.90/asymptote-2.90-setup.exe/download You will notice the installation looks quite different that what you show. Asymptote ships with its own packages and doesn't have an additional installer like the one on your screen, so it must have come from somewhere else.