Certain times of day will tend to take longer than others. Leo and I are volunteers, and do have regular lives.

Do you use the VPN?

They added a setting to "Automatically adjust the maximum number of columns" which - if enabled - seems to limit you to 6. Disable it and your previous default should return.

Did you check if there is an updated version of the extension?

Strange, when I visit this page and spot the link for the offline installer it saye

https://www.opera.com/download/get/?partner=www&opsys=Windows&arch=x64

(which clearly says arch=x64 and does give me the 64-bit version)

Likewise just a little further down the page I see both 32-bit and 64-bit offline installers listed for Opera GX.

Maybe the page recognizes that I'm already using a 64-bit browser and that's why it only offered the 64-bit version of regular Opera? Anyway, if you don't get the 64-bit link, there it is.

Is this using Opera's own Open dialog or is the web app trying to access them itself? Opera does not allow websites to access your local file system, so if it is the app then there is nothing to do about it.

Amazon AWS is Amazon's "cloud" service, as such it could have anything on it. Some legitimate websites use AWS. You'd have to tell us when and how you're seeing it for us to even guess whether it should be there.

Opera no longer supports speed dial extensions.

You probably need to turn off the ad blocker first, as it would block that site.

In other words, whatever font is specified doesn't support Thai characters, or you haven't installed the appropriate language support in Windows yet.