thank you for the link, but I tried that already. I got it working again:
I installed version3 and version 4 on top of it. Version4 worked. In the (Win10 Pro 1909)"App & Feature" list version 3 and 4 was listed. I deleted version 3 and and both versions were gone? Installed v4 again and it is working now. It looks to me v3 is setting / installing data which v4 need but not create.