Stalling in cold weather...

It was 39 deg. this morning on my ride home. Just like last year, the bike wants to stall when you come to a stop. I figure its carb icing. Happens at temps between 35 -39 degrees, maybe colder too, but 35 is about my limit. Today it stalled in mid slow speed U-turn. The center stand, by the way, is the first thing that contacts the ground when you go down on the left side. No damage save for a scratch on the center stand.
What can be done to fix this? Would opening the pilot screws make it better or worse? Any input is appreciated.

Rich