Andre, the issue we have been working on turned out to be a problem with our MAC developer environment rather than the app itself.
We have done a few more tests on clean OSx 10.8 with latest updates, and SpotEditor seems to be working fine as-is (the same copy as in our free 360 viewer download
To make it work on OSx 10.8 we have installed the latest X11 2.7.4 via http://xquartz.macosforge.org/landing/
And you also need to install Mono framework using this link (same as as per our readme in the free download):http://download.mono-project.com/archiv ... in.x86.dmg
Also, it looks like you have to restart your computer after initial installation of X11 on fresh Mac OSx for it to start working with our app.
Once all this is done, SpotEditor launches fine. Please let us know if this helps.