If you are not an advised user then I strongly recommend to put all pages in the same folder and use the same settings (= same database) for all pages.There is only the change password tool that does not accept my database when I want to edit it.
At least until you have everything wrong.
No, there should only be one database.Do I have to create a file with the same name as my database in the folder where I want to put the tool change password?
Menu -> Page -> Page HTML.I don't know where to look for it. Please, understand that I don't know anything about programming