If you decided to use the compiled version of EnCee, you must "Trust" the self-signed certificate used to make it (otherwise compile it yourself).
To run non-App-Store apps in Mountain Lion, you must either reduce Gatekeeper's setting (System Preferences > Security & Privacy), or "Trust" the certificate that was used to sign the app.
Once you've placed it, right-click EnCee and choose Open, then proceed through OS X's prompt to Show Certificate, then in "When using this certificate" choose "Always Trust".