Firmware Release for OpenVPN WAN

Hello,
I still don’t understand whether and why I need the license mentioned, because nicobar’s question was unfortunately not answered. Are the instructions from the second post “Quick Start Guide” still up to date? Could someone please clarify this? Thank you.

[I am new and setting up an Peplink router for the first time.]

As nicobar wrote, I can add a OpenVPN server under the “Advanced” tab and connect to it (“Status” tab → OpenVPN: connected). But I can’t get it to use the VPN server’s DNS. It always stays with the ISP’s DNS server (resulting in a DNS Leak), or no connection is established (no PING).
Could someone please provide a general explanation of this?