Hi Joost,
I was just thinking last evening: maybe you loaded the Equin88.lz5 directly with the Load OS button? When I tried that, the application indeed crashed. But this is not the way you have to do this (at the moment) - first you have to run the LHA tool to extract the file in the Equin88.lz5 file.
Be sure to read the readme.rtf document (present in the installation folder).
But - the next feature will be that you directly can load the Equin88.lz5 (and other models as well), and that the LHA tool will be ran in the background.
Regards,
Equinox61_User