One thing is changed in FamilyEcho (I'm glad!): when you import a FamilyEcho file you will be asked whom to make the 'Back to me' person.
So:
1. in your tree you click the "Download" link (bottom line)
2. You choose the FamilyScript format and click the "Download" button. Then click the "Done" button
3. Now click the "My Account button" (top right)
4. Click the "Create or import new family" button (below)
5. Click the "Import GEDCOM or FamilyScript..." button.
6. Click the "Browse" button. Choose the FamilyScript file you just downloaded. Then click the "Import" button.
7. Now you read "Please choose yourself from this list". Click the button to the right of "Name:"
8. Finding the right person is made easier: type the first letter of the First name repeatedly.
9. Check the other data. If correct click the "Finih import" button.
PRESTO.