Unable to install Engineer's Toolset desktop 2025.1 on Windows 11 - requires dotNet 4 but dotNet 4 is already installed

Same issue as this thread, which was never answered. The installer says it's installing dotNet 3.5, then says dotNet 4.0 needs to be installed. When I try to install dotNet 4.0 manually, my system says dotNet 4.0 is already included in the system.

Has anyone been able to work around this? How?

Thanks!