I had had some issues opening a standalone player file after it has been ‘dormant’ for 6-8 weeks. When it is opened all I get is a black screen. The only way I can exit is to reboot my computer. It appears to becoming corrupted if it is unused for the 6-8 weeks.
Normally that shouldn’t happen. It seems something is locking up. Can you please try renaming the .app file to .fms instead and open it in FotoMagico. Then re-export a standalone player.