I don't think there is a 2015 version yet.
The 2014 version is offered on the the Family Tree Maker website
here, and it shows the system requirements:
Windows 7 (32-bit or 64-bit) or Windows 8 (32-bit or 64-bit)
Hard disk space: 675 MB for installation
Memory: 1 GB RAM
Display 1024 x 768 resolution
DVD Drive
Internet connection required
This means it probably won't work as well on Windows Vista.
A lot of programs work with Windows Vista and most should import GEDCOMs. I like RootsMagic, and it says it's compatible with Vista. You can try out the free version, RootsMagic Essentials.
http://rootsmagic.com/Essentials/