The pilot reported that from the time she departed until the time of the landing, which was about an hour later, the wind had switched from a headwind to a tailwind. During the three-point landing with a tailwind, she started to slow the airplane, but was caught off guard when the airplane traveled off the left side of the runway. She then slammed on both brakes and the airplane nosed over, substantially damaging the rudder. The pilot added that if she had tapped the right brake she could have corrected the direction of the airplane. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.