If the company you work at owns the SAM 6.2 application, it should be available once you login onto the SolarWinds customer portal -- under the Licenses section https://customerportal.solarwinds.com/Licenses. I logged in onto my SolarWinds customer portal and I see SAM 6.2 RC1. See screenshots below..
If you do not see it yet in your customer portal, I suggest you contact your sales rep. I hope this helps.