The KATTIVE license is GPL.

This mean

Freedom 0 – the freedom to use KATTIVE,

Freedom 1 – the freedom to study KATTIVE,

Freedom 2 – the freedom to copy and share KATTIVE with others,

Freedom 3 – the freedom to modify KATTIVE, and the freedom to distribute modified and therefore derivative works.

Only respect the GNU General Public License.

If you never heard of this license please take a look here: ‘How To Apply These Terms To Your Program’ e ‘GNU General Public License FAQ’.