We started Affinity Designer today. It greeted us with a lovely message telling us to update to the latest version. We downloaded it, ran the installer, it thought for a couple of minutes and said "Install failed".
Now, we can't start the version that was working before. We just get a message that the link has expired. Our PC is effectively no use to us, this is the only thing we use it for.
We have paid quite a lot of money for this PC and we have supported Affinity because we are a small business like you. We aren't computer people. We just want to be able to do our work. Every time we have tried to do an upgrade to Designer, it's broken our PC.
Please let us know how we get working again.