We do not have a download file for the latest version (10.3.1.509), but you can try downloading it from the developer's site
Scarica la versione 9.5.1.733 da Software Informer
Scanned by 75 antivirus programs on Jan 7, 2025.
The file is clean, see the report.
Versione: 9.5.1.733 (x86/x64)
Date update: Feb 27, 2023
Nome file: installprism9.msi
Dimensione: 155 MB