Thank you very much, sgunhouse!

Hello,
I had lived in Thailand for some time and somehow I switched to use thai google by default - i.e. when I write a search query in the url text box or in the search text box on the speed dial screen, Opera uses thai google (google.co.th). I don't live in Thailand anymore and would like google.com to be used instead. But I can't find how/where I can change it. I tried to reinstall the browser, tried to search and delete for "google.co.th" or "th" in different opera settings files and many other things, but with no result.
Please help.

I've been using Opera for more than the last 15 years. But it looks to me like someone is ruining the greatest browser on purpose. I know that's not true of course. But it looks like that And the new bookmarks system is one of the things which ruin the browser.