MonoCMS is published in "rolling" style. There is the basic version and there are also multiple updates and fixes, all included within the basic package. Follow the development news for more details.

Update

The files in monofiles folder are the 'core' of the CMS. Updating basically means to update these files (not the subfolders).
The rest of the files might occasionally receive changes as well but the users are not, usually, required to update them.