Some progress
I tried bleaching the rest of the floor last night, but that didn't work. I thought of masking the floor and sanding it in place, but masking around those tight corners didn't work so here is what I did.1 I scored the dark brown caulking with a sharp knife.2 In the widest part of the sole so that I didn't have a corner to break off, I slowly pried the edge of the floor up.3 Next, I slowly slid a pry bar under the floor giving the caulk that had been used to stick it down time to release. I slid the pry toward the smaller corners and it came up easily.4 A glass scraper took the caulk from the floor under the sole. A putty knife removed most of the dark brown caulk from the edge of the floor. A Brillow pad removed most of the remainder around the top of the cabin floor edge that might show when recaulked.5 To clean up the edge of the sole, I found that, using a razor knife and drawing the ege of the blade backward along the edge of the sole, it removed the caulk easily. IMPORTANT! Hold the sole so that the finish side is away from your knife hand so that if it slip off it only scratches the back side of the sole.