I ended up buying a new DVD from Amazon.ca as bgelfand indicated above. I poked around a bit on the Adobe site for Canada but there was no option to upgrade from LR 5.7 to LR6. Perhaps I should send him a link to the definition of the word 'integrity'. In this post he states that 'Future versions of Lightroom will be made available via traditional perpetual licenses indefinitely.' I suppose 'indefinitely' means 4-years to Adobe. Here is a link to a post by the Adobe product manager from 2013 The rest of us are SOL - Sorry, Out of Luck. Adobe goes with the money - they are a business.

For us armatures, who may use it one a week, once a month, a subscription is not economical. Since professional photographers have adopted Lightroom, they can afford a subscription model they use it everyday and can write it off as a business expense. 'Lightroom Classic has a huge and loyal following among professional photographers, though, so we’re guessing Adobe is much more committed to keeping the app itself alive than it was keeping the app’s perpetual license alive.'

Lightroom classic 6