I Am 66 And Have Over The Past Year Gained

I am 66 and have over the past year gained approximately 10 pounds. Mostly hips and belly. I exercise 4 days per week and do not feel I am overeating. My Thyroid test came back 3 times needing medication. I took for one month and a small fatty lump appeared on my throat and we discontinued medicine. Most recent thyroid test came back in range. How may I best loose this unwanted weight? Is there anything that can target belly fat and reduction? I am taking medication for hot flashes comparable to Effexer.