Without more specific information, it's difficult to provide a step-by-step guide on downloading or using Infobel Espana Office V15. I recommend visiting the official Infobel website or contacting their support team for the most accurate and helpful information.
While specific technical logs of "V15" are scarce due to the proprietary nature of such software, one can extrapolate the user experience based on the standards of Windows desktop applications of that period. The interface likely featured a search bar with advanced filters: Infobel Espana Office V15 Descargar
Infobel España Office V15 Descargar [VERIFIED] - Google Drive Without more specific information, it's difficult to provide