loosen bolts, leave nuts on. wiggle back and forth till any silicone releases.
then remove bolts.
Mine galled real bad when I pulled them, and the bolts were not reusable on assembly. They were also slotted, and I replaced them with Phillips, since you cannot get to both the screw heads and the nuts at the same time, I found it necessary to have someone else run the ratchet while I was under the boat pushing on the screw driver.