@waynemccrimmoniiyt unless you don't want to loose a lot of open tabs... Also.. It might not solve it as mine had the wrong setting when it was installed.. But it is so easy to go to settings like I wrote earlier.. No need to uninstall

@oliverdavis2006 Thank you!! I tried everything with no luck... but your post made me look for a setting in opera like that in chrome.. I found it! it was apparently turned on as a default when I installed the browser.

for anybody with the same problem:
safety & privacy -> cookies and other webdata -> clean cookies and webdata when closing opera. --turn this off.