Enable Chrome NPAPI plugins

How to temporarily enable NPAPI plugins If you must use a NPAPI plugin, there’s a temporary workaround that will work until Chrome version 45 is released later in 2015:
  1. Open Chrome.
  2. In the address bar at the top of the screen, type chrome://flags/#enable-npapi
  3. In the window that opens, click the link that says Enable under the Enable NPAPI flag:
  4. In the bottom left corner of the page, click the Relaunch Now button.
After the release of Chrome version 45, you’ll need to use an alternate web browser to load content that requires a NPAPI plugin.

Source: https://support.google.com/chrome/answer/6213033?hl=en