Step 1: Go to the REAPER page on Academic Software and click on the download button on the right to download the software.
Step 2: Extract the zipped file in your download folder.
Step 3: Open the .exe installation file.
Step 4: Click on 'I Agree' to accept the licence terms.
Step 5: Choose an installation location and click on Next.
Step 6: Click on Install to start the installation.
Step 7: Click on Close once the installation is complete.
Step 8: Open REAPER.
Step 9: Click on Yes.
Step 10: Click on OK.
Step 11: Click on 'Import license key' to activate your licence.
Step 12: Click on 'Import license key from file...' and select the .rk file in the folder you just extracted.
Your licence is now activated and REAPER is ready to use.