Search for "SAP Business One 10.0" – you will find platform-specific packages (Windows/Linux server, SQL/HANA versions).
They will provide the correct download links specific to your license type (Perpetual vs. Subscription). Sap Business One 10.0 Download
Never download version 10.0 on a Friday afternoon. Installation and server reboots can easily take 4-6 hours. Search for "SAP Business One 10