I got Opera working today. This may have worked: https://support.mozilla.org/en-US/questions/1140218 deleting Opera installation files. I then downloaded this Opera version, Opera for Windows. And now everything works OK, even the tabs aren't changing color when downloading. But not sure if it was deleting the Installation files that worked, or maybe it was downloading a different Opera browser (not sure if it is the same one that wasn't working). In any case, so far so good. Thanks for your help
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