If the download is blocked, copy/paste in your address bar:
This will restart your browser completely. Then click on the Testapic extension and the download should restart.
It is also possible to deactivate/activate the Testapic extension which makes it possible to restart the data transfer. Type in the address bar:
then search for Testapic extension.
It is important not to close your Chrome browser until the data transfer is complete.
If the transfer is interrupted after it has started, then it can be restarted at any time.
If the problem persists, let us know through our contact form.