I bought a saw the 120 ks but I have not used it yet but now that I see that the new one came out as I can change it for the new one

Saul, I don't see that you purchased this saw from Tool Nut or Festool Products. I searched by your first name and your email address. As long as you purchased it within the last 30 days the Festool distributor you bought it from should be able to take it back from you. If you did purchase this from us in the last 30 days under a different name or email, send an email to info@toolnut.com and we can help you with setting up an exchange. If not keep us in mind for your future tool needs, we offer most major brands and we stock 100% of Festool's catalog Thank you! https://www.toolnut.com/