Hi Kevin,
What you are seeing there in: "C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\fsx.exe (.FSSAVE)", is probably an old install, which is in FSX's default location, but with a .FSSAVE indicating that parts of your FSX have been saved/transitioned when you changed over to Win10. Any of these files will probably not be useful anymore.
It's likely that you now have bits and pieces of FSX all over the place (and clearly, your Repair attempt did not yield any positive results), so you need to get rid of every instance of FSX before you can do a fresh install of FSX. Firstly, when you go into your Uninstall programs (i.e. the long list of installed programs that can be deleted from there), does FSX or FSX Service Packs .... show up? If it does, then uninstall from here. Secondly, go to your Cortana Search box on desktop and type in FSX, and see if any entries come up for that. FSX should be removed from a number of places, including your Registry, so hopefully your search will throw up some of those spurious entries. If you use a program like Advanced System Care (free and paid), then that has a provision of a 'powerful uninstall', where it does a pretty good job of cleaning out remnant files.
Once FSX has been removed completely, reboot your computer before doing a fresh install. Also, hopefully the install will go through smoothly as FSX has been known to give issues when installing or activating in Win10. But that's another matter. If the install goes through correctly (and I would suggest installing FSX to the root of your drive, e.g. C:\FSX), then check the location (whether the drive or in Program Files (x86)) to see if FSX has actually installed. At this stage, I wouldn't even consider installing Service Packs 1 and 2, as it's imperative to have FSX functioning properly first.
See how you go.
Chris