After digging through archived drivers and old support pages, I confirmed that appears to be the last stable version of the DriveRack 260 Updater.exe before dbx shifted focus to the Venu360 series.
: The specific Driverack 260 v1.61 firmware loader file extracted from the HARMAN Pro Help Center Hub . 2. Putting the Hardware into Bootloader Mode driverack 260 updater v1.61
If your update stalls or displays an error message, use these solutions to resolve the issue: After digging through archived drivers and old support
If you are using an older version of DriveWare, update it. It is recommended to use the latest version of DriveWare with the v1.61 firmware. Putting the Hardware into Bootloader Mode If your
Connect the DB9 serial cable to the RS-232 port on the back of the DriveRack 260. Connect the opposite end to your computer's serial port or USB-to-Serial adapter. Power on the DriveRack 260. 3. Identify the COM Port
Firmware updates for hardware processors like the DriveRack 260 address critical system communication bugs and optimize internal processing. Resolving Communication Issues
Do not unplug the cables or power down either device during this time.