The academic and trial version can be downloaded and get a license file for 2 months, through E-mail (kimkd@konkuk.ac.kr), after user fills up the registration form in this web site. The academic version (not trial version) can be continuously used for the purpose of thesis and teaching, by sending a mail with brief description of use.
After use of 2 months, user can purchase the X-SEA and X-OpenFAST by send a mail(kimkd@konkuk.ac.kr)