v1.2
Converted the dialog to a floater with rollouts to separate creating a mapping from the operations. Floater position will also persist between Max sessions.
Added a Mirror operation which enables aligning the source objects to the mirror of the target objects across either a chosen world axis or a picked object's local axis. Optionally, you can bake the operation throughout the time range.
Removed the Bake button and replaced it with an optional checkbox for the Align operation.
Improved error handling for missing mapped objects.
v1.1
Fixed "Exclude hidden objects" from not working with non-hierarchy selections containing hidden objects.
v1.0
First release.