www.jfileupload.com

I'm trying to try JBatchUpload (unregistered) with JFileUpload Premium. When I add batchui.jar to the list of jars, I get this exception on load:

java.lang.NoClassDefFoundError: jfileupload/transfer/client/core/G
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at jfileupload.transfer.client.util.Conf.getTransferUI(Unknown Source)
at jfileupload.upload.client.MApplet.loadUI(Unknown Source)
at jfileupload.upload.client.MApplet.init(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Is it possible that this isn't possible? Do I need JBatchUpload Premium to be able to do this?

You need JBatchUpload Premium for JFileUpload Premium. In fact you need the same level of license for all of our products. You can test JBatchUpload Pro with JFileUpload Pro. Does it help ?