The Show explorer button was removed in planswift 10. If you would like to have that button you need to install planswift 9 and remove planswift 10 from your computer and you will need to reinstall the dll files for the integration and the instructions for that are listed here https://support.planswift.com/solution/categories/5000068906/folders/5000107799/articles/5000500610-how-to-re-install-excel-integration