That is too bad given you only missed the window by less than a week, if I were you, I would return it, get a refund, and rebuy if you still want a Rigol after your recent experience. Let them deal with the loss associated with the return open box. Or buy a different brand if you don’t like how you are treated.
They have a 30 day return policy, it is dumb to deny upgrade to buyers who purchased the scope less than 30 days before the return period. The are asking for a warehouse full of open box returns. Anyone who has worked in retail strategy or operation could teach them a lesson in the consumer market in how to deal with these situations.
If I were Rigol, I would give these features away for free for all current owners if they buy the logic probe as an upgrade. So their strongest supporters - those of us who were willing to buy the scope early when it was buggy, would feel like there’s a way to be included in the promo. It will help them to drive goodwill in the community and retain customer loyalty.