Hi to everyone. Just happened to see this. See below:
Link: Upgrades from Zorin OS 17 to 18 Are Now Available - Zorin
Should be interesting to see how everyone's upgrades go.
i hope the system upgrader is available when its time to move to Zorin 19
but a heads up to all that use it .. please make backups of your data before upgrading.
best of luck Steve ..
Tried it today, but the V17.3 was pretty much OOB. Everything went smoothly, did a quick update afterwards.
Thanks to the developers
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My son upgraded his instance. His PC is a dual-boot (with Win11) on a single SSD and his /home is encrypted.
It worked well.
The only weird thing is after the update and reboot, the system prompted him with the 'null' dialogue box to output his encryption backup/recovery code. Not sure why it would prompt him to do that, i can't imagine Zorin would re-encrypt his /home.
I'd be interested to hear more reports from people who have run the upgrade process. Successes & failures. I'd also be interested to hear from anyone who's running Zorin OS 16 PRO, and how the upgrade to Zorin OS 17, then to 18 went for them.
I'd be all too happy to report on behalf of me, when I am emotionally prepared, to run the upgrade myself. For now, I'm remaining cautious, and just looking to hear more reports for others.
I have done the Zorin OS 17 to 18 upgrade succesfully yesterday. Everything is working fine and no errors sofar. Only some titlebar settings and dash setting where back to default. But that was an easy fix.
During the upgrade I made one mistake. 
I selected full 18 pro upgrade. So it installed a lot of apps I don't use. My 17.3 install was a minimal installation.
Upgraded 17.3 to 18 on my daughter's computer. It didn't go well.
It seemed to get stuck at about half way downloading the files from the mirror. It refused to download. Zorin told me my install is at an inconsistent state and i should probably install from scratch. Screw that.
I re-ran the upgrader. It said there's a newer version, then it seems to go to an Ubuntu dist-upgrade tool of some kind (i'm not familiar with Ubuntu much) - not the Zorin one. It still got stuck with the mirror.
I tried to change the mirror via the GUI, but it refused to 'take'. It appeared to take, but when i looked at /etc/apt/sources.list it still had the broken mirror for most entries except the old version. So i manually updated sources.list to the UK ubuntu.com mirror.
Ran the updater again. This time it managed to download the files ok (using the Ubuntu upgrader, not Zorin's). There were many prompts to accept or not newer versions of config files. Apart from grub i accepted all the newer versions.
I rebooted after it was finished and 'about' says it's worked (it says it's 18), but it kinda hasn't. For example, it's missing the screen snapping feature (top bar). The virtual desktop icon thingy is in a different place from vanilla.
Is there any way for me to force the upgrade to run again?
edit: the tiling thing was available in the menu, i turned it on and it seems to be working. So i guess some Zorin-specific appearance settings weren't set.
As i'm new to Zorin, i've never done a major version upgrade before.
It seems that on a non-vanilla system, it could be better.
- Removes PPAs. OK, fine, it does tell you it will do that. But how about it lists the PPAs you have, and links to a tutorial webpage that shows how to add them again, so the user can copy/paste them back after the update more easily. Better yet, put them back after the upgrade (with user acceptance).
- Removes the installed software that was delivered via the PPA? I didn't expect this. The upgrade deleted Borg (my backup software) from the system.
- Removes drivers? The upgrade removed the tablet driver/configuration software from my daughter's PC. These drivers were installed via a local .deb file. I didn't expect that to be removed.
It is possible that my compromised upgrade affected some of these things.
first make sure your Zorin 17 is fully updated and all your data is backed up, then ..
this is a how to to upgrade Zorin 17 core to Zorin 18 core
you can then upgrade Zorin 18 core to Zorin 18 pro.
best of luck Steve ..
Mine went flawlessly, apart from the problem - reported elsewhere - of not picking up a 32-bit based WINE-installed application. Not a major issue, as there are ways around it, but it means extra work.
