I’m still hosed 
My Manjaro files are all still there, but the only way I can access them is with a live USB.
I can load my Windows partition but only by booting through BIOS.
When I boot Manjaro I get a menu with “UEFI Firmware Settings” only.
If I edit the file off the boot menu, it says only this:
setparams ‘UEFI Firmware Settings’
fwsetup
It just seems like there should be a way to fix this, without installing another operating system, wiping out everything and starting over. It was a lot of work. Years actually 
Lots of stuff loaded and customizations and all that.
I noticed this previous entry in the Support record:
Perhaps I could recreate the EFI partition off the bootable USB, as this person did?