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Cache does not clear all cookies / files system
I did a clear cache and all other files (from beginning of time).
Whilst most people assume Opera has been done its, I went back in to check and selected 'all cookies and site data'. It has cleared everything, except for an item from on web site. It was n't a 'cookie' but a 'file system' object. I am not sure of the difference between the two. I had to manually delete this item, from Opera.
Running Windows 10 Pro, running latest edition of Opera.
Why did n't it clear everything?
You could also try exploring Win key + R, type %appdata% -> Local and find Opera related files. File system objects are usually placed there. Additionally, you can try using CCleaner for a full cleanup. However, by default, it should have cleaned up by default.
"Did you have the site open in another tab? "
I am aware, Opera can pre-load web sites....
"Did you have all the checkboxes (except perhaps passwords and autofill) checked?"
Yes, I did have all checkboxes ticked. It deleted all of them, except for this one web site. I have to log on to this web site.
"You could also try exploring Win key + R, type %appdata% -> Local and find Opera related files. File system objects are usually placed there. "
That looks useful. Do you know which directory exactly?