Running Windows 10 here and a few months back I moved to the Native Arduino IDE installed from the MS Store and then uninstalled the downloaded Program_Files installed version. The MS Store version is in a hidden/locked folder for security reasons (but I found it ran better in the W10 environment) so on upload of the project XOD detected Com Port 4 (MS) as the active port but was unable to find Ardiuno.
Once I re-installed the separate install version of Arduino it was found easily and worked fine.
Thanks for the App, the Alpha access and I am getting into it slowly. I am not a seasoned programmer so this is still a little new to me. I find in some cases I think programming ability is assumed and that can make it harder to learn fresh (like me) rather than transition from previous environments.