"A little bit later he told me, that all development on this cartridge/software has been stopped, because there would be no market for it in Hungary"
No market? Maybe it's because the VTGe was not at all connection with the users! Just heard as a legend about the MIDI interface. We not even seen least a photo! Until now.
Thousands of Enterprise users waited for new developments for a years but don't got anything from the official company.