Obtaining an official copy of the Primary Setup Tool V4.2 can be challenging as Siemens has shifted focus to its successors. Official Source: Downloads are typically managed through SiePortal (formerly Industry Online Support) Access Requirements:

While PST V4.2 is robust, Siemens has officially shifted focus toward (Infrastructure Network Manager). SINEC INS provides centralized management for thousands of devices, supports secure bulk firmware updates, and offers a modern web-based interface.

Within minutes, what was once a silent collection of hardware is now a reachable network. Sarah can now close the Primary Setup Tool and move on to the TIA Portal