All in all, Free RAR Password Recovery should please all users who want to retrieve RAR passwords. I'll bet you caught this I, in practice, partially disown this habitual suggestion. This is what the experts are saying when this is really dangerous and flirting with disaster. So, you use brute force to retrieve the lost password, as well as specify the character set - Latin, caps Latin, space, digits and other symbols.  
The app has not caused us any issues throughout our evaluation, such as freezing, crashing or popping up error dialogs. I can surely see where this formula combined with Winrar Password Remover could actually help.  
https://docs.google.com/document/d/1UVTMNFr9LHegaoenk9sAu24ycC5EwvTu0oIAFQBQlI8/