Im still new to HA, so maybe i have done something wrong.
After updating my HA i can’t find the Add-on button under settings.
I have tried rebooting, logged out and back in, checked that advanced mode is activated.
But nothing have gotten the add-on button back.
Can anyone help me with that?
Or do i have to reinstall the hole thing?
Well… Add-ons were renamed to Apps. Are you aware of this? Does it show an Apps button?
No i did not know that. Guess i have to start reading the release notes.
I have the Apps button.
Thx you so much. I have spent hours trying to find out what had happened.
Indeed! Welcome to the club! 
Definetly! Take a look at the release notes before updating. A lot of people update on every release. Some wait and do it every few months. Major releases happen, typically, on the first wednesday of a new month. Patch releases, typically, happen every friday. Best practices seems to be updating on the first patch release of a major version, as people aim to minimize any quirks from the initial release. Always check the breaking changes in the release notes to see if anything effects you.