Can I *upgrade* (not buy from scratch) from Acrobat Standard 2017 to Acrobat Pro?

Clarification: I am not asking if I can purchase Acrobat Pro from scratch as if I had not already purchased Adobe Acrobat Standard. The answer to that question is an obvious yes. I'm aware.

Yesterday, I purchased Acrobat Standard, mistakenly thinking that it had the bates numbering function. Today I realize only "Pro" has that function. I am very well aware that I can just pay full price for the Pro version. My question is whether I can "upgrade" to Pro. In other words, if the price for Pro is a little bit more than the price for Standard, can I just pay that difference to get the Pro version?

I've searched this question for a while now, and the only response to this question about "upgrading" are comments providing links to the pricing page. Respectfully, that is not an answer to the question.

By analogy, let's say I purchase a hotdog and forget to ask for catchup. I realize my mistake and I turn back to the counter to ask if I can get catchup. The worker says, "Yes, you can now purchase a second hotdog, this time with catchup on it." I don't want two hot dogs: one without catchup and a second with. I just want one hotdog but I want to add catchup to it. Right? I'd prefer, all things being equal, not to have wasted the money I spent on the Standard Acrobat.

If the answer is "No, you must now face the consequences of your dumb decision," okay, I get it. But please tell me that clearly. Don't pretend that purchasing from scratch is the same thing as a simple "upgrade".

In other words, I am not looking to walk away from this transaction with both Acrobat Standard AND also Acrobat Pro. No. That's not it. Please, can I get a non-nonsequitur answer to the questions, "Can I *upgrade* from Standard to Pro?"