No, I am a new customer (You'll create an account next). Yes, I am a returning customer (I have an account already). Please, provide your login details. The default FL Studio installation will register the program for the current Windows user. Registering FL Studio for all Windows users is also possible (in FL. This method can be used to unlock FL Studio from trial for the first time or after purchasing . Activate Boxed software - see 'How to register your Boxed software '.
*this tip edited to reflect instructions for Mac and Linux systems with thanks to Tyrone and Chris and the instructions from Image Line Software*.