After all, the Salt Lake-based company has put a lot of trouble in its rear-view mirror. With at least 8,000 conventioneers converging on EnergySolutions Arena on Thursday, the officials knew they no longer had to worry about now-settled litigation against a bitter Internet critic of the company, a now-over wave of short-selling of the company's stock and uneasiness in the first two quarters of the year as the recession took hold.