The .Net extension is still not in the 'Install Extension' list of extensions.
I disabled MSAA and UIA (UI Automation Support). Here is the full name of the objects that I can only interact with using mouse clicks.
Sys.Process("APPNAME").Window("WindowsForms10.Window.8.app.0.378734a", "APPNAME - System - [HOME]", 1).Window("WindowsForms10.Window.8.app.0.378734a", "", 1).Window("WindowsForms10.Window.8.app.0.378734a", "", 1).Window("WindowsForms10.Window.8.app.0.378734a", "elementHost1", 1).Window("HwndWrapper[APPNAME.exe;;b0dece9c-77da-4f27-88b2-396f536d4943]", "elementHost1", 1)
Sys.Process("APPNAME").Window("WindowsForms10.Window.8.app.0.378734a", "APPNAME- System - [HOME]", 1).Window("WindowsForms10.Window.8.app.0.378734a", "", 2).Window("WindowsForms10.Window.8.app.0.378734a", "", 1).Window("WindowsForms10.Window.8.app.0.378734a", "elementHost1", 1).Window("HwndWrapper[APPNAME.exe;;02535f7d-4695-496e-8ba5-2d112b703c9d]", "elementHost1", 1)