Here's a refined version of that:
1. In your tree, click the "Download" link (bottom line).
2. You choose the FamilyScript format and click the "Download" button. Then click "Done."
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 the "Name" button.
8. Finding the right person is made easier: type the first letter of the First name and do so in order with all other letters in the person's name..
9. Check the other data. If correct, click the "Finish Import" button.