if its the same one i saw before, it's not claiming to mine nano, and says clearly that it's mining monero and sending out nano
It is still risky to download a program from someone who just signed up and it is his first post here. It would be a lot more credible if it came from someone that is a Full Member or higher. In either case I would rather wait for many others to try something and report it working fine before I would risk it.