I receive emails in which I get notified that a new update/upgrade of your theme is available.
How do I install the updates/upgrades?
Do I have to
Is that the way to go?
And if. Is there an easier way to do that? Like for example to update it within my WordPress page (in the theme section).
I hope you are well today and thank you for your question.
What you have explained is manual way of updating theme, you can also auto update the theme as described in the following pages.