Connecticut’s bank regulator won’t renew the licenses of one of the industry’s top players, Ameriquest Mortgage, and could impose a stiff fine against the company, which allegedly violated state law by overcharging borrowers on prepaid finance charges. “I am unable to find that the financial responsibility, character, reputation, integrity and general fitness of the applicant and of its officers, directors, and principal employees are such that warrant the belief that [Ameriquest’s] business will be…