Hi,

I have bumped Wintun version to 0.7 and signed openvpn-gui installer
with OpenVPN Inc certificate,

http://staging.openvpn.net/openvpn2/openvpn-install-2.5_git-I607-Win10.exe

To use wintun instead of tap-windows6, add "windows-driver wintun" to
your VPN profile.

Just re-tested on Windows Server 2019, works as expected.

-Lev