Edgar wrote a script for migrating from the last version of flutter (v1.0 or v 1.1) to magic fields (v 1.1).
You can download the script from here:
or from here:
How use it.
Just follow the next steps:
Download the script here you have a raw version.
Make a backup of your database (for any unexpected bug).
Put the script in your parent folder (where you has the wp-config.php and all these stuff)
Rename the script from migra.txt to migra.php
Enter to http://yoursite.tld/migra.php
And its all, this script change all reference from flutter to magic fields.
Change the name of your folder files_flutter to files_mf
Put the Magic fields plugin in your plugins folder.
In your admin area active Magic Fields.
And its done.
for the version 1.2 of Magic Fields uses this script. http://gist.github.com/227581
for the version 1.3 of Magic Fields uses this script. http://gist.github.com/284805
for the version 1.4.5 of Magic Fields uses this script. http://gist.github.com/558207