The problem is that I'm not living in my country, and the browser displays what you want and not what I want.
Thanks for answering.

I want to choose the search engine.
If it's for security, can be done as firefox, downloading the configuration from the oficial addons page:
https://addons.mozilla.org/en-US/firefox/addon/google-argentina-54139/

It not is useful that the search results are from a country that does not interest me.

Thank you!

Hi. I'm using Opera portable from portableapps. The browser worked well and I had it configured with multiple plugins.
However, when you open it again (without rebooting my pc) I find that the browser started "from scratch" absolutely erasing all my settings, bookmarks and plugins.

Reviewing only see a message that says (copy-paste):

Version: 35.0.2066.82 - An error occurred while checking for updates
Update stream: Stable
System: Windows 7 64-bit

It's a stability problem ?. It has never happened to me before this with a browser.
Sorry for my bad english and thanks.