When I go in to Tools -> Options and change the default Locality from United States to Canada the mass UPC import does not pick up on titles that do not have a Canadian locality for them, however the individual one does.

As a result I've been using the US as my default and manually changing them.  After having to change roughly half of my collection to Canada, the workflow for doing it is quite annoying.

I enter the UPC for the title and under Locality it lists the US and has an option (it's a button with "...") for me to change.  I can double click on that entry to bring up a new window which lets me change the field.

This is where the workflow breaks down.  I can press up/down arrow to select the proper locality however I cannot press enter for it to be "OK".  I have to click on the button.

Minor annoyance, but for mass input it would have been very very helpful (especially for us who live and die by their keyboard).

Edit: Also the "Select this locality for remaining entries where available" does not seem to work as intended.  When clicking it, I would expect anything I enter into the mass UPC list would choose that specific locality (Canada) if it was an option, however it seems to have no effect.

Loving the software so far, even though I complained about its price.

If I change the entire locality to Canada, US only options don't show up even when I've entered the proper UPC in.  Personally I think it should still say something that "this exists, but for this locality".

And when I'm entering them in via mass import by UPC I would expect similar functionality, or for it to default to Canada but still allow entries that there's other localities opposed to saying it just doesn't exist.

Agree with all that has been suggested. One way to get "best of both worlds" is to perhaps flag subsets of profiles for which analysis has ben done, and you are certain of the validity of the locality change. You can load, modify and save flag sets very easily. Once the decisions have been made, BulkEdit could be used (Load Flagged, change Locality, Save Validated Changes) to automate the mechanics of making changes that have already been validated to be correct.

Your choice, but I agree that bulk changing of Locality should be done with caution. And of course there is no good way to offer choices during an automated bulk process (plugins can't access the choices anyway).