The first installation page requires me to consider V1 to V2 conversion. All boxes are
greyed out and cannot be checked. This is likely fine since there should be no files left
from vers. 1.6, but it was mildly disturbing that the first three unchecked boxes in the
lower panel say "Use the V1.x item/s from their current location". I would expect that
a default would be to go with the version 2 locations. (This may be due to the fact that
I am not yet a registered user.)

The reason this dialog appeared is because the V1 preferences file was probably still sitting in ~/Library/Preferences. What I should probably do is bypass it completely if the actual AstroPlanner V1 folder is not present, or contains no relevant files.

Fixed. The dialog is not shown if there's nothing to convert.