Dear Ziut,
Until 12, there was an Educational edition, different from Developer Edtion.
However, since SQL Anywhere 16, as a free-trial, without the purpose of usage in Production,
you can register Developer Edtion for 16 from
SQL Anywhere 16 Developer Edition and choose option "Higher Education and Research" for option in Industry field. Developer Edtion has all the features, i.e. Moblink,High Availability, and many more.