If you own a licensed copy of RSLogix 5000 Version 16 through Version 20, the migrator tool is included as a built-in feature. You do not need a separate download. To access it:
Because this is a Rockwell utility, you will need a free Rockwell Automation Support Account.
Warning: Do not search for "RSLogix Project Migrator free download" on generic software sites. You will find fake "crack" sites that bundle malware. Only download from compatibility.rockwellautomation.com or rockwellautomation.com.
Rockwell provides a 30-day trial of Studio 5000 Logix Designer. During that trial period, the migration tools are fully functional. This is a legitimate, risk-free way to migrate a handful of legacy projects without purchasing a license.