I think you can mine directly from their platinum coin wallet as I have seen the website and there were only a download link which led me to the github of platinum coin.

I am afraid to download the wallet as I see not a single review or comment from more than 25 days and who knows what lies behind the wallet. I want to ask the OP here to enlighten us and tell us a more in depth that the software is virus free and where to mine this coin.