@sebi
Hello!
You need to uncheck "Use Hummingbird if available" in the "Preferences" > "Advanced" window. Eddie will then look for OpenVPN in your command path (OpenVPN must be installed in your Linux box). If you have some OpenVPN binary you want to use outside the path, then you need to tell Eddie where to find that OpenVPN binary. Note that Eddie will run with root privileges only binaries owned by root.
Beta versions exist exactly because unexpected problems may (and usually will) come out. Eddie stable releases are always packaged with a tested Hummingbird version. About the Suite, we are almost ready to launch a version linked against our openvpn-airvpn fork fixing the new bugs and regressions unfortunately inherited from the main branch which we did not find with our tests (our fault, hands down). If you want to use Eddie with a working version of Hummingbird you can rely on Eddie 2.21.8, which is the latest stable release and is packaged with Hummingbird 1.2.0.
This is an excellent question, and currently Eddie can not renounce to those directives for a complex reason. In a few words, with the risk of oversimplifying, it's because of how our servers are configured in order to maintain backward compatibility with OpenVPN 2.3 and 2.4. Sooner or later we will break compatibility at least with OpenVPN 2.3. From that moment on, Eddie can be re-designed with more freedom in mind and some behavior which may appear "strange" when compared with ordinary OpenVPN configuration files (as it is in this case, with the directives you mention) can be simplified or canceled. Also note that some other behavior is dictated by the fact (and this is perfectly logic as well) that Eddie adds some important features on top of OpenVPN features (routes inside and outside the tunnel, DNS management, Network Lock...).
Thank you, this sounds like a bug and it's great that bugs are found during beta testing (or anyway before a stable version is out). We will forward your message to Eddie's developer. Furthermore, please feel free to report this on GitHub and on Eddie's thread in "News", if you wish so.
Kind regards