Nook App not avail for Canada?

I have two Kobo Vox's.
A few months back I loaded Barnes & Noble's Nook app on one of the Vox's.
I am now trying to put it on my second Vox and I'm having difficulty.
I tried to load from Goodereader's app site - says "Download Failed" - no reason.
Tried from Google Play (boy was that difficult to find!) and it asks which device I am loading to (very anal); when I select a Vox, it says the app is not available for the country of my device (which is Canada).

Has something changed?

Would anyone have an idea how to get the app on my Canadian Vox?

Thanks.