There are two possible locations where you can download the software (driver and CaptureOnTouch) for the RS40: Support | Document Scanner | imageFORMULA RS40 Photo and Document Scanner | Canon USA - https://www.usa.canon.com/ Canon USA website:
The length of documents that can be scanned with the R40 / RS40 is normally 356mm (14"), but you can scan documents up to 3,000mm (118.1") long by setting the scanner to the Long Document mode. Follow the steps below to enable Long Document mode.