Hi to all, the latest Eddie 2.18.8 experimental released today, works with wintun, please test if interested.
Go to https://openvpn.net/community-downloads/, at bottom "OpenVPN 2.5_git wintun technology preview", click the "here" link and install.
If you already have the right "openvpn.exe", use it directly: Eddie will install the wintun driver when needed, and also create the adapter.
Eddie -> Settings -> Advanced -> OpenVPN Custom Path -> choose your "openvpn.exe" from 2.5, if already installed probably it is "C:\Program Files\OpenVPN\bin\openvpn.exe".
At this point, Eddie will use OpenVPN 2.5 (but still with standard TUN driver).
Eddie -> Settings -> OVPN directives -> Custom directives, add "windows-driver wintun".
At this point, Eddie will use the OpenVPN 2.5 with the newest Wintun driver.