This is where you change the "install game location" if necessary. Run the game till you get to the main menu. (Avoid re-running the game "launcher" if possible, but only run it once if needed.) Due to age: try starting a 'new game' to make sure it will actually do so on your...
I have them both installed. If mods that have FOMOD script installers get updated, I need to use MO2 to install them. I moved everything back to MO1 for launching the game due to the INI Tweaks not being in MO2, but if GSDFan's solution works, I can move to MO2 and not jump...