Hello Steve,
I've always assumed (possibly incorrectly) that PhotoDirector isn't TWAIN compliant. It doesn't appear in the Application dropdown in my Canon scanner preferences.
Aside: Someone told me once that TWAIN was an acronym for
Technology
Without
An
Important
Name, and I believed them.
There's no reference to TWAIN compliance in any of the PhD documentation I've seen, yet other CL software (MediaShow) is.
Whenever I've used scanned images, I just import the scanned TIFFS or JPEGS into PhD manually.
I'll seek clarification from CL, but I suspect that the lack of reference to TWAIN we've found is a good clue about the answer.
PIX
PIX YouTube channel