Here is the first MonoCMS of 2021, finally available for download. Some of the changes and new features include:

New custom session

Search filters in posts

New classes and functions

A sidemenu, as the default navigation menu

Safety improvements

Easily build and include plugins and extensions

New xml files, like 'dates.xml'

Asynchronous javascript used instead of an iframe when saving a post or page

Theme and Navigation pages are removed (for now at least).

Some old elements are also gone. Nothing against iframes, but the iframe to load a user icon from a folder, in settings, is also removed and replaced by an input element. See also the updated documentation page.