Thanks for trying. It's really strange that it doesn't work on your OS X while it does on mine (and on someone else's system who tried it somewhat recently). I'd like to figure out why.
I've pushed a small update [1] that prints the current working dir of the app. Perhaps you can try it and verify that it's being set correctly. See this screenshot [2] for Xcode setting that sets the running app cwd.
[1] https://github.com/shurcooL/Conception/commit/37bbbb57e56caa...