Which installer did I download? The only one I am able to find on http://www.opera.com/computer/windows (I clicked on the green button that says "Download now"). The button leads here: http://www.opera.com/computer/thanks?ni=stable&os=windows
The downloaded file is named "OperaSetup.exe" - there is no version number, nor any indication whether it is 32-bit or 64-bit. After the install is completed, I run the browser and see it is 32-bit.
I can't find the option for 64-bit.
If you could direct me to the download for 64-bit installer, that would solve my problem, I think.