After clicking on the plus icon to add a new account you only have to enter your email address and the password. Only when Mail Archiver can't guess the server name you have to enter it manually.
The core problem in every software is learning where to click. The existing help system explains what the single elements of the Setup do. The new help system will show you where to click.
The Tour has a more modern look:
Transparent windows don't do anything. I find them distracting so I really don't like them. But finally you can have a transparent window if you want. As usual it's possible to disable the feature:
Version 6.2 adds a few features to improve the Setup: