I presume you are aware but just in case microsoft no more SHA1 authenticode https://forums.openvpn.net/topic20987.html
Hi,This was not entirely unexpected. I'll try to get this fixed this week and then release new installers. I suppose Microsoft has finally fixed Windows 7 so that it can handle SHA-2.
Thanks! -- Samuli Seppänen Community Manager OpenVPN Technologies, Inc irc freenode net: mattock