Chrome would warn you about the download whether it was an exe or an msi file. Chrome is basically telling you they have no idea if SWCpoker is legit, they cannot vouch for the downloaded file, and you should be careful. Considering this is a new client on an entirely new domain, this should not be too surprising. The fact that your browser warns you about this file should be the least worrying thing about this whole deal, considering this is a new poker site under new management with absolutely no history of anything, and an apparently new tech team who nobody knows, with no safeguards for anything at all if you get fucked, on a platform nobody has played on yet.