Thanks to Browserstack for their support of this project.
The location of the JAR file that is referenced by the Web Start JNLP files has changed recently. It used to be https://s3-ap-southeast-2.amazonaws.com/ag-iridium/, so your JNLP files used to look like this:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="https://s3-ap-southeast-2.amazonaws.com/ag-iridium/">
...
</jnlp>
The new file location is https://s3.amazonaws.com/iridium-release, so your JNLP files should look like this:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="https://s3.amazonaws.com/iridium-release">
...
</jnlp>
Files from https://s3-ap-southeast-2.amazonaws.com/ag-iridium/won't be updated, and the certificate used to sign the JAR file has expired, so you will most likely receive a warning if you do not update the location.
See the documentation for more details.
A training package has been made available on Udemy.
Download the latest version from here
Find past releases here