You should have received at least two emails from Zorin. The first email confirmed your order you had made. The second email is the email that contains the download link, as well as your registration number.
The email you would have received will have the title: Zorin OS 16 PRO
Yes, the download link is included in the email. You must have access to that email in order to ensure security that you are the original purchaser.
You may have ordered from one email, but registered with a different email - this can happen when someone makes the order, but then uses the PayPal Linked email to close the transaction; which is a different email address.
I'm certain I received both, but am only showing the order conformation. It's been a whirlwind summer with the move, and it would not be the first time I deleted an important email.
I don't show any emails beyond my original purchase date of 4/8.
It just came to me. I'll reply to the Zorin team from that order conformation email and request another download link?
Was it not August 2021, the Zorin 16 Pro got released?
If you bought a paid version of Zorin back in March, it might have been Zorin 15 Ultimate.
If the confirmation email came from Zorin website itself, and not Paypal, then yes, you can try replying to it. If it does no good, the other option is to bring Azorin here for admin level assistance. Which I am going to do anyways to insure you get a resolution.
@AZorin User needs admin level assistance in regards to needing Zorin OS PRO download link, lost email.
Lets hope you didn't lose your registration number too, otherwise its going to have to rely on your email address as proof that you made an order.
I do not think it is the email address Zorin group uses.
Their email always comes from their own domain
zoringroup.com
Correct, I'm referring to it in it's present form since it's been upgraded. Yes, my purchase email specifically says Zorin Pro 15.
In that case, I am afraid you need to but another licence for Zorin 16.
Point upgrades are free but not the major upgrade.
But in fact, there is not much difference between Core and Pro version.
Most of us purchase Pro version in lieu of making a donation to support the developers.
If it comes down to having to purchase it again, I think the OS and the effort behind its development is well worth another $39.
Understood, and I completely agree.
It is a real bargain 
But see my reply above.
It is simply up to you.
Core have all basic functions Pro offers.
Now that I have clarity from your inputs, I'll purchase another license for 16 and problem solved.
Thanks again everyone.
You should always save your purchase emails, especially when there is download links in them. And because losing the registration number is NOT an option, especially since you need it for support, is the reason why I print them out. I also save a copy in a document file, that I store alongside the ISO file, which I save on my NAS storage.
Also, in the future, when it comes to moving and packing boxes for the move, its prudent to put stuff like computer stuff in a box and label it computer stuff. This way there is no question as to where your flash drive is, you will know, cause you know what box you packed it in.
Anyways, good luck to you! And, I am really excited by the fact you got a Framework Notebook, I am super stoked about that. I am really hoping that you bless us with delicious content on that puppy.
Agreed with each point. I'm in the process of downloading my new purchase. I've been in systems, infrastructure, and development since 88. I started running BBS sites, developing shareware, then started writing AV Software for John McAfee, databases, web dev, etc. When I retired in 2014 I was designing, developing, implementing and documenting data centers. In between I did everything from switch management (both IOS and JUNOS), component development, large process storage systems (most recently NetApp). So I clearly understand the value of protecting digital purchases, and associated paperwork (licenses, et al). Unfortunately, or otherwise, from the time we listed our house to the time we were packed and on the road was 38 days, so many of my standard practices fell by the wayside in lieu of expediency.
I appreciate the explanation. Piggies unite! 
I fully understand the situation.
I moved back and force more than 20 times, crossing the Pacific Ocean 2 times and the Atlantic Ocean 1 time.
Things can get lost easily in such big moves.
At least, for the digital front, it is now getting easier to keep my emails on the server side. As long as I do not forget the master password for my KeeePass
