[arch-general] Win10 Upgrade makes ArchLinux inaccessible?

Hi All, So my laptop upgraded to the latest version of Windows 10 recently, and this seems to have undone the hack of replacing the default bootx64.efi file. That is, the file is still SystemD’s boot loader, but somehow I’m back to only being able to boot Windows reliably. Has anyone else seen this particular frustration with an upgrade? I note that my laptop came with Windows 10, so this was just an incremental update as far as I now. Thanks for any ideas. This is kind of maddening. Best, Zack.