Re: An incompatible version of this game is installed on your device.

@Voidesent  Please uninstall Sims 4 with Revo Uninstaller (the free version is fine).  Before doing so, go into Documents > Electronic Arts and rename the Sims 4 folder to something that doesn't include "Sims 4" so Revo can't find it.  Uninstall the EA App with Revo as well.  Restart your computer and reinstall the App, then the game through whichever platform you want to use.