Cyber attack has been more prominent and dangerous nowadays. A large number of computers are being target of ransomware. To protect your data you must make a backup of the data in a regular basis. I don't know if my thinking is correct or not.
My opinion is that  use of a free tool to recover important data is equal to giving access of your information to them. Its not worth doing.
So, what is your opinion about this? Please share your valuable comment. For more info about this read this post from my blog.