Release the Stop button (while still holding Power), then press the Stop button .
Once the process is complete, turn the printer off and then back on to exit Service Mode. Important Safety Warnings Service Tools for Canon Printers | PrinterKnowledge stv3600resettersexe upd
The tool is part of a series of proprietary service programs (like V3400 or V6300) used by technicians to perform deep-level maintenance. The "upd" in your search likely refers to an updated version or a specific executable file designed to fix bugs that occurred in earlier versions of the resetter software. Supported Printer Models Release the Stop button (while still holding Power),