Are you trying to save the FD, or simply remove it so you can mount another?
If it's only a matter of removing it, you can grab the stud with vice grips and try to turn it. Or if that fails, carefully saw through the band on the left side - where it's away from the frame - with a saw or Dremel.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.