Solved Restoring the original boot code?

I somehow bungled the installation of the multi-boot (Boot Easy(?)) code, and would like to rewind it back to the original single-boot code, but I can't find an example and don't want to guess. Help?
 
I had it as UEFI priority, but changed it when Win8.1 (which I was trying to install on another disc) complained.

Show says the disc is GPT, and

4010241freebsd-boot(512K)
1064671,088,6402freebsd-ufs(320G)
671,089,7041,275,067,392-free-(608G)
1,946,187,0967,368,0313swap(3.5G)
1,953,525,1271-free-(512)
 
There's no efi partition so this disk never booted with UEFI. To fix the freebsd-boot: gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 ada0. Make sure to adjust ada0 for your situation.
 
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