I read this thread and wondered if you have recently installed Windows 10? If so, you may have the answer if you can move everything to a Win 7 computer. Perhaps the difference between you and those still able to run this program is that they are still using some version of Windows previous to 10. If this guy has 'disappeared' perhaps he never got around the making the software compatible with Win 10. Sounds as though you may be also lucky if your data was not stored on a 'cloud' somewhere (owned by the person who markets this software, who disappeared).
This is one reason I do not trust anything to 'cloud' storage - if that 'cloud' fails (and it can since it is on a server somewhere) or the company fails and stops supporting everything you could definitely lose all your data. Nothing magical about 'clouds' - they are still hardware based, just not in your house. But, one hopes that is not the case here.
I hope you get all your recipes back, safe and sound. Good luck.
