Magic Particles is really Freeware or Trial?

Hello from Spain!
in astralax.ru said it was freeware, but in another page (astralax.com) that says we must buy it.
Softpedia has said that in a trial for 30 days.
What is the correct indication?
in astralax.ru said it was freeware, but in another page (astralax.com) that says we must buy it.
Softpedia has said that in a trial for 30 days.
What is the correct indication?