Shareware means everyone is free to copy the program any way he likes — but everyone who uses it regulary or professionally oughts to send some money to the authors (As a regard for their work).
In return you will have the following advantages:
The second is that there is a maximum of ten ligtable entries. This is not important if you want to convert just a few characters or just test the converter; but it is when you want to convert large fonts.
But you can pay your shareware fee and you'll get a converter which can process such fonts, too.