The new implementation is found in the component package C:\build\filerepository\windowmanager_a2ea4897, and is called windowmanager.exe. Two XAML files, DwmDsk.xaml and DwmWin.xaml, are not present in the builds and must be reconstructed in the same directory as windowmanager.exe. These were likely meant to be eventually included as BAMLs in the aero.msstyles file, had the managed DWM implementation not been ditched due to the development reset. An earlier version of the Jade theme (preferably the one found in builds 4066 to 4082, as some DWM resources that were in STREAM folder got converted to bitmaps in builds 4088 to 4093's Jade) or modified Jade from this range of builds that replaces bitmaps with their PNG counterparts is required in order to allow DWM to work.