I read this blog post (https://www.opera.com/blogs/desktop/2016/12/20-year-edition-opera-42-ships-new-gifts/)

It said:

"The network installer for Opera 64-bit

Update: For some Windows 10 users the conversion process of 32 to 64-bits has led to removing Opera from the list of available browsers to set as system default. In order to fix this issue we temporarily stopped serving 64-bits for Windows till the proper fix is provided.

The new version comes with the network installer for 64-bit builds, which installs the best option for you. In other words, it detects the architecture it’s run on and installs either Opera 64-bit or Opera 32-bit. Moreover, it’s able to upgrade (not to be confused with auto-update) from 32-bit to 64-bit. After the upgrade, the 32-bit version is removed from the system. Don’t worry, it will keep your profile, so you won’t lose any data, and the transition is smooth – you may not even notice it. For those who don’t like it, we left an option to prevent this change."

So, then I tried to install Opera 42 x64 through network installer (so, I must redownload the offline installer from download page).

Then, I checked the running Opera through Process Hacker, it showed still 32-bit version.

What should I do to get the x64 version of Opera 42?
What is exactly "the network installer"? Is it the offline installer from download page?