@fixopera I agree with you all you have said; I am bothered with the same as you. Very disappointed. I have come back to Opera 99 until they fix these tremendous errors.
You can come back to Opera 99 simply going to Opera folder through Windows explorer, you will see there Opera 100, Opera 99 and maybe others. Simply delete the Opera 100 folder and the rest of versions if there is, except Opera 99. Then restart the computer.

@algon
It is correct what you say but I recommend you to add a letter, for example "s" to the file opera_autoupdate, which is Opera 99 folder. If you do it, you will have 1 less subprocess in the opera internet browser process in Windows task manager. Besides, if you delete another file in the same place called "crash reporter", you will have another less subprocess. I delete the latter in every Opera version I install.
Every time you want to update, you must delete the letter added in opera_autoupdates. You can do it quietly, no problem.

@algon
It is correct what you say but I recommend you to add a letter, for example "s" to the file opera_autoupdate, which is Opera 99 folder. If you do it, you will have 1 less subprocess in the opera internet browser process in Windows task manager. Besides, if you delete another file in the same place called "crash reporter", you will have another less subprocess. I delete the latter in every Opera version I install.
Every time you want to update, you must delete the letter added in opera_autoupdates. You can do it quietly, no problem.

@fixopera I agree with you all you have said; I am bothered with the same as you. Very disappointed. I have come back to Opera 99 until they fix these tremendous errors.
You can come back to Opera 99 simply going to Opera folder through Windows explorer, you will see there Opera 100, Opera 99 and maybe others. Simply delete the Opera 100 folder and the rest of versions if there is, except Opera 99. Then restart the computer.

In Opera 100 for Windows, now called Opera one, the home page icon, located just at the left of navigation bar, has disappeared; anyone knows how to recover it, or is it a tremendous bug?
Thanks.