: A license is valid for two major versions (e.g., a license bought during version 7.x is valid through all of version 8.x).
In REAPER, go to Help > License and user agreement... and select Import license key to browse for the .rk file. reaper-license.rk
If you have recently purchased a license for (Rapid Environment for Audio Production, Engineering, and Recording), you may have received an email attachment named reaper-license.rk . For new users migrating from other Digital Audio Workstations (DAWs), this file might look unfamiliar. What exactly is this file? Is it a virus? How do you use it? : A license is valid for two major versions (e