It's impossible to provide information and troubleshooting because there are no details about this product or about its developer. However, to completely export the data, first you need to make sure that the data that's already opened is correctly added and displayed in the program. Secondly, go to the Export menu and double check the settings used to export. In most of the cases, the problem is related to the way it's configured the export menu, even if the software works correctly. If there are any other errors, try contacting the developer. Use Help > About to find more information about him.