"Runtime error 'SimObjectsPathsRemarks' is not a valid integer value".
This indicates your Prepar3D.CFG was already corrupted before installing, with an illegal command exactly in a keyword we must search and modify. The word "Remarks", seems to indicate you edited wanting to comment something, but you cannot use a keyword in that way, it would cause the file to be syntactically wrong.
This is how those lines supposed to look like on a proper install:
SimObjectPaths.0=SimObjects\Airplanes
SimObjectPaths.1=SimObjects\Rotorcraft
SimObjectPaths.2=SimObjects\GroundVehicles
SimObjectPaths.3=SimObjects\Boats
SimObjectPaths.4=SimObjects\Animals
SimObjectPaths.5=SimObjects\Misc
Then, you might have other section, starting from SimObjectPaths.6 and above, with other lines from other addons, like SODE, etc. but you surely cannot have a SimObjectsPathsRemarks keyword, which IS a mistake.
I'm sure that, as soon as you fix your Prepar3d.CFG file, the installer should run normally.