You have to install the Jangaroo IDEA Plugin version matching the desired Jangaroo version. The Jangaroo IDEA Plugin version starts with the IDEA version (9 or 10), the next three numbers are the bundled Jangaroo version (e.g. 0.8.3), then follows the Jangaroo IDEA Plugin build number (e.g. 0), resulting in a five-part version number (e.g. 10.0.8.3.0).
