The domain also appears to be blacklisted by McAfee, but is coming up clean from Google, Norton, and all others. McAfee states the site is "not as secure as it should be", but it doesn't give any elaboration on that:
https://www.siteadvisor.com/sitereport.html?url=devault.ccI ran all their downloadable wallet files through Kaspersky and VirusTotal online scans, and they didn't flag up anything (not that that means they are definitely clean). Anyone thinking about downloading any unknown application should be doing so in a sand-boxed environment, virtual machine, or even a separate machine, to protect your device and data.