The phrase (free update) is critical. In the software industry, updates can mean bug fixes, security patches, or feature additions. For Proteus 89 SP2 Professional, this free update typically refers to:
Simulates both hardware circuitry and co-simulation of microprocessor software. proteus 89 sp2 professional with arduino 18 free upd
Windows 7, 8, 10, or 11 (64-bit recommended) The phrase (free update) is critical