Hi! You do not need the pro version for this, should still work in the free version.
Do you have the shipping address enabled in the Invoice settings (PDF Invoices > Documents > Invoice)?
Also note that this setting only shows the shipping address if it is different from the billing address (which was the case for the old version of this plugin too).
If you always want to shop the shipping address regardless of whether it’s different, you need a filter:
add_filter( 'wpo_wcpdf_ships_to_different_address', '__return_true' );
Read this if you haven’t worked with functions.php or code snippets like this before: How to use filters
Hope that helps!
Ewout
