Entering 9 random digits worked for me.
Thanks a lot Michael. It's seems to work. That's perfectly silly, since I suppose this software is just a converter. It should be available to anybody wanting to convert raw Oly files. Go figure...-- hide signature --
Silly is just the word. I entered 000000000 so it's not even as if I inadvertently stumbled upon a legitimate serial number. Ah well, as long as it worked in the end!