Hi -
From the Auctiva site: 'Auctiva can be used to post listings to eBay US, eBay UK, eBay Australia, eBay Motors, and eBay Motors(Parts and Accessories).' So no, it doesn't work for eBay Canada.
Here is a list comparison of a number of other Auction Management alternatives:
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Or you could try eBay's Blackthorne,.