If you are new to the world of FSX, then this is most likely the scenario for you.

A separate registry entry will be created specifying FSX:SE and the fact that you want coexistence this is an important point if you do ever take the plunge and move forward with an FSX:SE install only. Your original data and settings remain unaffected, but will also not be copied across. The differences, whilst slight, will have a profound impact on the way you install your extra aircraft and scenery. Before I do this however, it is important to make a distinction between two types of set ups: the single install and the coexistence install. An exciting time no doubt, yet it also poses challenges that the community has not had to face for many years. The end of saw the release of the first updates to FSX in 7 years with the release of FSX: Steam Edition, and with it a swathe of new pilots in our community. Operating systems and the architecture of the home PC evolved in leaps and bounds but FSX maintained just as it was. Whilst other titles have come and gone, or carved their small niche in our virtual skies, FSX has remained that which we benchmark from. F or almost a decade Microsoft's Flight Simulator X has remained the go to software for us to get our flight simulation fix.

How to install addons fsx steam edition