: During setup, ensure RAR and ZIP are checked so WinRAR handles these files automatically.
If you click "Close" every time, you are essentially using the "WinRAR free full version" forever. No features are disabled.
rar a -r -m5 backup.rar C:\MyDocuments
Yes, this is a unique "shareware" relic. The official WinRAR license agreement states that you must purchase a license for continued use in a commercial environment (businesses, governments, non-profits with revenue). For , RARLAB has historically tolerated indefinite use of the trial.
Once you install, here is what you can do with your free full version: