In this version of OptQuest, optimization settings are stored in workbooks instead of separate .opt files. Only one group of settings can be stored in each workbook. This is convenient for using and transferring models. However, there are times when you might want to have more than one group of optimization settings for a model. In that case, you can create different blank workbooks with one group of settings stored in each. Then, you can open a "profile" workbook with appropriate settings and use it as the primary workbook in the OptQuest wizard. As long as your main model workbook is also open, OptQuest will use the settings in the blank workbook and your model will still run as you intended.