I am looking for the update.sql files, if exists, starting from v1.6.2 to the latest version or at least to v2.0 so I can apply the changes to the database myself.
Meanwhile another user came up with a link in a posting to a backup-and-update-script that exports the content of a mlf-1.7.x-installation in a format, that should matching the necessities of a mlf-2.1.x-installation and should therefore importable there. Currently I am working on a partially rewrite of the script because the script will not work on an actual PHP-version (PHP 7.0 or newer).
With an older version of PHP (below PHP 7.0) the script should run (untested) and provide a SQL-backup in the correct format for a reimport in mlf 2.2.
Trenne niemals Müll, denn er hat nur eine Silbe!