1. Rename current machform folder name (ex : machform_bak)
2. Upload new machform folder and files
3. Copy "data" folder from old machform to new one
4. Rename "config-empty.php" to "config.php" and fill/move the information from old machform
5. Delete "installer.php" file.
Are these the correct steps to upgrade from 2.1 to 2.4?
