Activation of SDL 2019?

Hi! When I bought SDL 2017, it came with a 'free upgrade to SDL 2019 on release of the new version'. I have never received any specific activation code for SDL 2019 though and can't activate it with my SDL 2017 activation code either.
Now I need the 2019 version (or higher) for a client. How can I activate SDL 2019 which I bought bundled with SDL 2017? Thanks!

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