Its working again! Im not completely sure when it is rolled out for other langauages, but here in Germany you can now download a "Quality Update" called KB4038788 that enabled the use of all NEO´s and VBar Controls even in Bootloader Mode without the need of the Workaround we provided.
The Update will be installed automatically if you enable the automated update or trigger it manually by explicitely requesting the Windows Update.
Its quite anoying, that there is no word in the changelogs, nor any response to our detailed technical bug reports at all. However, its working again now, so enjoy your V Products with latest Windows!