that software will not help you a lot. How it is possible? as far as i know, before you create a new wallet and then metamask will give you a pop up to save your seed phrase into a file. you should ask him if did he already downloaded it or not?

That doesn't make sense if he was not trying all of the options to store his metamask. there will be a million possibilities to crack your seedphrase and that will not help you to recover your seed phrase again. If you have been losing it and there is no way to recover it.

So many people have been talking about this, some already made a request to add an export feature for metamask and the dev keeps ignoring it.

Not possible to crack seed words. I do not think any software can do that. Check once again the address where you sent those ETH and then try once again. Otherwise forget it.