I also have two Gmail accounts, I opened both on Google Chrome. One has the option for "Go back to classic Gmail" in setting button. But another account, automatically changed to "New version of Gmail" today, and there is NO OPTION for "Go back to classic Gmail" in this setting button.
I visited this Gmail Help Forum, but no solution found.
Since I hate this new version, can we/I move to the classic version of Gmail?
If possible, could you please help me return to classic Gmail version.