Download QuickBooks Premier Professional Services 2015

My wife just got a new computer and I need to install Premier Professional Services 2015 onto it. I have the key for it from the install on the old computer and while I was able to download a 2015 Premier version from Intuit, the key doesn't work as it wasn't the Professional Services version. I realize this is old but the business it was used for has been wrapped up and I only need the software for a couple of years on the off-chance I get audited.

Any ideas would be greatly appreciated. I am most definitely not willing to pay for an upgrade or buy a new version.

Thanks!