Try Scanner Monitor, instead: Scanner Monitor.You might try Scanner Screen. https://drive.google.com/file/d/0B_Jndzk4GdzJRW9tU0d4VGZMVlk/edit It's for the BCD436/536HP scanners, but might work for the 436PT as well, but I don't know for sure. It will let you view what's going on with the scanner, but doesn't offer control.
I've used Scanner Monitor, and it did a good job. The reason I didn't recommend it was due to this info, posted on Scanner Monitor's website.
The Scanner Monitor application uses a Chrome App to connect to BCDx36HP scanners. This service will not be available for new installs later in 2017 - and will no longer run in early 2018. The following is part of Google's notice for dropping this capability: