I have a Dual License of version 10 and want to upgrade to Version 12. When I originally purchased my licenenses, I thought I needed two, one for my work PC and one for my laptop. However I learned one license covers a PC and Laptop. So I think I need to upgrade to a single license version. The cost of upgrading a single rather than a dual license is around $20.
My question is if I only upgrade to a single license, can I upgrade my other license later, and how much will it cost?
Will my license still work as a dual License, one upgraded working on Version 12 and one still working for version 10?
I'd like to save the $20 bucks if I don't need both license upgraded, and have the option to still use the license on older version with the ability to upgrade the other half of the license at a later time, at the discounted price.
What are my options in upgrading a Dual Licenses?