FYI, I downloaded Stencyl 1.0 osx and installed it for the first time today, every time I launched the app, I'd get "Warning: Stencylworks is already open or was unexpectedly closed. Would you like to continue?" Even tho the app wasn't running previously, even occurred after a reboot.
Also if I tried to update, I'd get "Stencylworks was unable to complete the update process.". And I wasn't able to download anything from Stencylforge.
Long story short, applying the patches from this thread fixed my issues and Stency is running fine on my Macbook now.