1. Download the licence file (rarreg.key) from here:
https://drive.google.com/file/d/1safyXJ3962GRPIbGYtAub1aO2NpCfrit
2. Place it in the folder where WinRAR is installed (this is usually C:\Program Files\WinRAR)
3. Open WinRAR and enjoy
WinRAR is a powerful archive manager. It can backup your data and reduce the size of email attachments, decompress RAR, ZIP and other files downloaded from Internet and create new archives in RAR and ZIP file format.
Official website:
http://rarlab.com/