Hi Marko.
Tnx for reply.
I have been sitting with Stackpath CDN support all afternoon, and they found that I had enabled CDN in W3TC, which caused the problem. Disabling it and the site was all find again.
So I am fine for the moment.
Best
/Ulf
btw I can wee now that the site is looking somewhat better with 2.7.6. than with 2.7.3. The buttons are back as well as the menu. But background picture still missing.
I tried to read on WordPress forums on how to update plugin with zip… Anyhow, I dont really remember all settings so I need to use backup and get back to version 2.7.3
I have deactivated and deleted the old one, and installed the new one. So you can look at the site right now (as far as I can see the settings are however not transferred to the updated version…).