You are free to distribute this unlicensed shareware version of Othello.  After 30 days or 30 games you must register it to continue playing.  Registering can be done by sending your name, email(if you have email), address and $8 to:

John Bloch
1514 Stallings Rd
Durham, NC 27703

Once you have your registration code you can upgrade any number of times to any newer 2.x release from:

http://mypage.ihost.com/jrbloch