- Yes, it asked me to enter the browser account and password repeatedly and it was not possible to kill the process from the task manager.
- I have no Maxthon folder in %appdata%.
Anyway, I deleted the program folder, in my case "Maxthon" and not "Maxthon5".
I removed Maxthon cache folders.
I put the clean portable back in a new Maxthon5 programs folder.
Now it works.
But I really can't understand why not before, since it was a clean Maxthon installation on a clean Windows 10.
Thank you for your fast and constant support.