StevenS

Hi, welcome to the Affinity forums.
If you do a quick search of this forum, in the Customer Service... area, you will see this is quite a frequent question!  Unfortunately, the answer is No.  Each different operating system has its own, entirely separate licensing system and there is no facility that will enable transfer from Mac to Windows or iPad, or any combination of them.
Sorry.

Hi @Masaru,
Welcome to the Affinity forum.
I want to install it on my laptop and desktop PC. That's fine, you can do that
Both are windows10. That's fine too
I use it alone. Usually the best way, people can be a distraction
It is not used at the same time. That would be some skill
Switch and use. That would be easier
The serial number has one each of designer and photo. That is correct
If there is anything else we can help with, please let us know.

Hi @Masaru,
Welcome to the Affinity forum.
I want to install it on my laptop and desktop PC. That's fine, you can do that
Both are windows10. That's fine too
I use it alone. Usually the best way, people can be a distraction
It is not used at the same time. That would be some skill
Switch and use. That would be easier
The serial number has one each of designer and photo. That is correct
If there is anything else we can help with, please let us know.

Hi, welcome to the Affinity forums.
Since you mention having AP installed on an old imac I'm going to assume it was actually purchased from the Mac App Store.  If so, simply log into the MAS account you used then and redownload and install the software.  As an MAS purchase, you do not have or need a Product Key.
HTH
Jeff

Hi, welcome to the Affinity forums.
You are asking for help with a Serif Legacy Product in the forums dedicated to the new Affinity range.  You really need to repost to the Serif Community Plus forum here.
HTH
Jeff

Hi @tlpmap,
Welcome to the Affinity forum.
Hopefully you have already seen the replies we sent through the other two channels that you asked this question, but in the event that someone else stumbles across this post, our legacy apps can be re-downloaded here.
Associated product keys can be requested here.

Hi welcome to the Affinity forums.
If both your notebook and desktop are running the same OS (Windows or Mac) and you own/control both machines, then yes, you can install the app(s) on both machines without any additional license.
One possible caveat: depending on which "notebook" you have, you may need to check whether it can run any of the Affinity apps. 
Also, if that notebook is actually an iPad then all the above does not apply, because the iPad does not share its operating system and app licence with either Mac or Windows machines; its licencing is unique to iOS.
Jeff

I have seen your advertising patch on Ronnie's Snooker waistcoat. It's a pity that he failed so early. However, good idea. NOBODY - even the deeply experts - did not expect this mishap. Always 1 of 10 good ideas fails for an unexpected reason. This is the one. However, WELL DONE(!) Affinity or Serif - whoever is resposible for this! I like what you do and the way you do it.
Cheers from Germany.

Sorry for the typos (which I've now corrected), I've had a week off. Please give a few weeks to get back up to optimum speed 

Sorry for the typos (which I've now corrected), I've had a week off. Please give a few weeks to get back up to optimum speed 

Hi @AG051,
Could you please contact the team over at affinityorders@serif.com directly.
If you could provide them with as much info about your order as you can, they will be able to look in to this further for you.

Sorry for the typos (which I've now corrected), I've had a week off. Please give a few weeks to get back up to optimum speed 

@StevenS that's really a con 

Hi @Brian Nguyen,
You can install the Windows licence on as many compatible Windows device you require for your own use.

So are the Affinity apps for iPad (especially with the Spring Sale which is on at the moment).

Hi Dave,
Welcome to our Affinity forum.
You can sign up for our newsletter here; https://affinity.serif.com/newsletter/

Hi @awan,
You can install Affinity apps on as many Windows devices as you require for your own use.

Hi @awan,
You can install Affinity apps on as many Windows devices as you require for your own use.

Hi @Alice Saurus,
Welcome to the Affinity forum.
You do not need to worry about it. All updates for our iPad apps are issued through the App Store.
As Apple and ourselves do not share any customer data, App Store purchases do not appear with Affinity Store accounts.

Hi @awan,
You can install Affinity apps on as many Windows devices as you require for your own use.

It's a good question, but until there's a plan agreed to and made public by the UK and EU I  doubt anyone will know.

Hi, welcome to the Affinity forums.
No, unfortunately you can't!  Each OS (Windows, Mac and iOS (iPad)) has its own licence and requires the user to have a separate (purchased) licence for each operating system.
Jeff

Hi.
10 days, starting from the day you first open the app. 
IOW, if you "open" it for the first time today, the trial will end 10 days later, whether or not you have opened it again in the meantime.
HTH
Jeff

@StevenS
Thank you for this post, and my apologies to @IsabelAracama for the error in my reply to you!
Jeff

Hi Viktor H. Morales,
Welcome to Affinity Forums
You only need to get the license once - you can then use it with whatever Windows OS version you have including running the program on more than one computer you own/control as long as you're the only one using the application for commercial purposes. So if you buy it now from the Affinity Store and install it on your Windows 7 computer you can use the same license later on a new computer running Windows 10 without issues.