An Orange County company says it plans to resume the selling of living trusts and retirement annuities Tuesday after a week-long halt. Alliance for Mature Americans had sent its sales force home while its lawyers and the state attorney general's office hashed out terms of a court order affecting the company's activities. The company, its owners and numerous affiliates were sued by the state July 18 for fraud in the alleged use of high-pressure scare tactics to sell its products to the elderly.