This tool works only with this website's local save. It does not send your save anywhere.
Close every other Prism Ward tab on this address before exporting or importing. Keep your original download as a backup. Import requires an empty destination and never merges progress.
To move from Render, export from a transfer page running on the original Render address, then import that file here. A source-origin transfer page has not been activated by this preparation. Opening this page on a different address cannot read the old save.
No save has been read or changed.