Just to name a few:Built using the VS2013 compiler instead of the old VS2005 library that was used when FSX was first released. This improves performance and overall quality of enjoyment, without removing the capacity to load up all of your old FSX add-ons and DLC that you owned for the original edition
The old GameSpy online mode that was frustrating at best has been removed entirely – it’s now replaced with a modern, easy to use Steam online mode. This makes matchmaking and finding other players to fly with easier than ever – this is one of the main new features and can really up your playability of the series, allowing you to take to the skies with your friends and fellow pilots with ease
Various changes to hotkeys to make the simulator easier to control with the keyboard, and making hotkey functions easier to memorize by having more distinct buttons linked
Huge improvement to the texture quality throughout – the amount of textures that can be loaded, as well as their default quality, has been improved
New aircraft have been included to make your flight experience even more enjoyable and varied
A huge amount of bugs have been fixed that have been plaguing users for many years – this makes it so much easier to fly your aircraft without being bogged down by strange errors
Improved overall load times for everything from the map loading up to the textures that appear on-screen – less lag between textures loading is one of the most noticeable improvements to performance
Improved compatibility with more modern operating systems too – this will run perfectly fine within Windows 7-8.1
https://flyawaysimulation.com/news/4728/I have Win 10 64bit and it runs fine.