The best cracker for rar files I saw was using the GPU not CPU, is that the case here since its brute force I believe thats the better route ?
I don't know about this program. But in general if you have a good dictionary it is a LOT better then brute forcing. But the key is it being a good dictionary, so you would have to have the password in dictionary. Having a huge dictionary I don't personally see as a big advantage. A more custom targeted dictionary is better any day. So if you are the owner and say know first part of password that is huge advantage when trying to recover a wallet.
So brute force is good for smaller ones as it goes though every single possibility. Dictionary focuses on specific guesses does not go through every possible combo. Where brute forcing fail's is longer or more complicated passwords. Some passwords are just not going to be brute forced it is mainly taking advantage of simple smaller password's.
I personally will not be trying this program as I don't really care to have a file from someone so new on any of my computers. Also I realy really don't like "cracker" as the program name.... you should be "recovering" in my eyes. So might look at name change. And again I would not touch till someone trusted confirms it is not something bad hidden in download.