Drive installation seems to be hot-reloadable but I still get a Restart button

When I click on the Start button to install Drive (after accepting the terms and conditions, on the Installation of Drive step), it takes some time to display the next screen. Which is the "Installation of Nuxeo Drive Marketplace Package (nuxeo-drive-1.0.1) completed", but with a "Restart button" (see attached screenshot). And when I click on it, the restart windows is displayed in the iframe, and so is the login page at the end.