Sim-connect is available in the SDK which you can download from the ‘Developers’ tab within MSFS, if you have it enabled, (that’s how I understand it). Older versions of Sim-Connect can be found here
Download Simconnect | FsPassengers I have this version installed within MSFS 2020 because I use SimShaker for Aviators, (Buttkicker Gamer 2 which requires an older version). This version was intended for FSX but also works with MSFS 2020. It is installed via an executable and easily uninstalled using the usual uninstall method within Win 10. If you install SimConnect from the site I have given you a link to, it will not conflict or cause any problems with Sim-Connect installed via the SDK within MSFS 2020. BRGDS. Charles
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