This update requires two news sdk to be installed, please to make it work, install .net 8 and .net 3.1 from microsoft :

1. Install ".NET Desktop Runtime 8.0" here in x64 (Carefull read the titles) : https://dotnet.microsoft.com/en-us/download/dotnet/8.0
2. Install ".NET Desktop Runtime 3.1" in x64 : https://dotnet.microsoft.com/en-us/download/dotnet/3.1

This update contains:

1. Big performance improvement on startup speed and the overall workload.
2. Internal database updated for 60% to the new mechanics of mythic mob.
3. Modified the 3D view, removed green plain unnecessary and slowing launch time.

This version is marked as 3.9