I've just checked other 3 files they are offering for free and all paswords are hashed in databases. No need to worry at all if your password is long enough.
Just for the sake of clarity, I did a quick rainbow tables check on some md5-hashed passwords from one of those dumps (the site which is already closed). Three out of ten hashed passwords (!) with an amount of altogether way more than 10 BTC could be converted back to plaintext. If I had more than five BTC in my account, I wouldn't use "johnjohn" as my password. So guys, hold on strong passwords, e.g. use calculated passwords which are different for each website (e.g. calculate them with a set of letters, numbers etc and the URL of the site or something like that, so they are not the same, but you can calculate them). Not to talk about 2FA.
And, to make sure that your passwords are safe, do a rainbow tables check on it. Important: download the tables and do it on your pc,
never put your password into an online rainbow tables website, as there are many sites which just wait for you to enter your password, so they can md5 it and get the correct hash for the password (so there isn't even any need to calculate the hash back into the password, because you already gave it to them).
One more statement: I'd never steal BTC/money/anything from anybody.
.edit:
Neither the amounts nor the password "johnjohn" is what I have found. Don't want to support people trying to steal bitcoins.