If you have purchased a Bosch Diagnostic Tool 3 (often sold through Bosch eBike Systems distributors) and need the software, here is the official
The Diagnostic Tool 3 is intentionally locked to the hardware dongle. Without it, the software is a viewer only. You cannot clear a "Drive Unit Error" or update a motor’s firmware. bosch diagnostic tool 3 ebike download
For the average rider, Bosch offers mobile apps (eBike Connect and the newer eBike Flow app). These apps connect to your bike via Bluetooth using the Kiox display or the Nyon computer. If you have purchased a Bosch Diagnostic Tool
Bosch protects its software to prevent tampering, liability issues, and security risks. The tool is tied to a hardware dongle (the Bosch Diagnostic USB Interface) that costs approximately €500-€700. Without this dongle, the software will run in "demo mode" – you can see the interface but cannot connect to a motor. For the average rider, Bosch offers mobile apps
Minimum Intel Core i3-3217U processor (i5-8250U recommended) and 4 GB RAM (8 GB recommended).
Help: Bosch Diagnostic Tool 3 for eBike – Where to download?