Noob messed up - Pls help


I installed easy bcd 2.4 on my pc. I have four bootable windows 10 drives.
I installed easy bcd to the first drive. If I set my bios to boot to that drive I can see and choose any os to boot from.
But if I choose an os from the boot menu other than drive one I can not boot to any drive.

Pls help.