I have steam version. There’s a version in steamapps which more or less contains the launcher and then the entire game is located in C:/User/[username]/roaming/Microsoft Flight Simulator. This is the default location because i’ve had bad luck installing the game (and mods) elsewhere.
Previously when i had done this, it installed the game in the requested folder when the installer ran (not the steam download) and like maybe i guess half the files are still loaded to the roaming folder. Never got my head around this. So i just let it install to default to cause the least amount of potential issues