Hello All,
I just purchased a lic for ZorinOS Pro 18 to upgrade from 17, but am not finding the option in the Zorin Upgrade app to upgrade.
When I run the app, it says no upgrade or update is available.
Sorry to ask, but when will the option to upgrade be available?
Thank you, but I am sorry to say it did not work.
Did you restart the computer afterwards?
i did not and did not know I needed to. I will reboot and see if that works.
It may also be that there a huge pressure on the servers at the moment. Everyone wants to upgrade at the same time.
I am sorry to say no joy on the reboot.
You also make a good point about the load on the servers. I think I will go make a cup of tea and tackle a few other things and check again later today.
Thank you for your help @Storm it is greatly appreciated and I hope you have an excellent rest of your day.
Welcome to the Forum!
The Upgrade Process isn't directly available to the Release now. You have to wait a bit until it is prepared.
As an Alternative, You could donwload the Pro ISO and make a fresh Install - of Course save Your Data before. The Upgrade Option will come later.
I was going to ask this too. 
It stands in the new Blog Article, too:
Direct upgrades from Zorin OS 17 to 18 will be available in the coming weeks. Stay tuned to our newsletter to be among the first to know when you can upgrade.
Hi everybody,
I decided to install Zorin OS 18 — mainly because I watched this video: Video. What really caught my attention was the ability to install Word and Excel as web applications on Zorin OS.
I started researching a direct upgrade path from version 17 to 18, but it seems like there’s no way to do that.
So, I began downloading Zorin OS 18 Core from a Ukrainian server, which seemed faster than others (I’m located in Turkiye).
Unfortunately, I wasn’t able to finish the download even after about an hour. But I’m not giving up! 
Next, I’ll prepare my USB stick for the installation.
I just hope the hardware drivers in version 18 will work as well as they did in 17. My laptop is a Lenovo ThinkPad L530.
If I succeed, I’ll try to post an update here.
Bye for now!
Ys, because it isn't available yet like I wrote above. That will come and then You can use the built-in Zorin OS Upgrader.
Then I would try to switch to a different Mirror Server.
I think thats normal, as the devs said this at the end of the blog entry for Zorin OS 18 :
Direct upgrades from Zorin OS 17 to 18 will be available in the coming weeks.
So you will need to wait a bit before the Upgrade app allows you to upgrade.