Hello Robert Coleman

Your  Freelance license doesn`t  allow you to use the software on a second pc/laptop. Only  Freelance Plus licenses have this option.

Thank you,

Sorin

Is an upgrade to a Freelance Plus version available for SDL Trados Studio 2015 Freelance, and if so, what would this cost?

Hello Robert Coleman 

It is no longer possible to upgrade Trados Studio 2015 to Freelance PLUS as this version is now retired.

You would need now Trados Studio 2021 Freelance PLUS.

Please contact our CX (Customer Experience) team who can advise you on the discounts and available options

https://www.trados.com/contact/chat.html