1. Download All-in-One WP Migration Unlimited from GPL repo
2. When you install "All-in-One WP Migration Unlimited", you will need to install also "All-in-One WP Migration"
3. Export your website by choosing a source a import on your newest website (NOTA: you don't need to install again "All-in-One WP Migration Unlimited" on the newest, only "All-in-One WP Migration" is enough)