ver. 4.1  
  Upgrade policy  

- Anyone who purchased a copy of FumeFX 3.x after September 1st, 2015 (inclusive) will get a free upgrade to FumeFX 4.0. Please send us email with your FumeFX 3.x serial number to receive a new one.

- FumeFX SL 2.x and FumeFX SL 3.x licenses are valid under FumeFX SL 4.0 regardless of their purchase date. Be aware that SL 4.0 will ONLY work with FumeFX 4.0, so users should not get the upgrade unless they are planning to upgrade their full FumeFX license at the same time.

- mental ray rendering license does not require upgrade