If the session type in the application settings is set to "Web Start", the following settings are displayed in the middle part of the dialog:

• URL of the JNLP file
  Every Web Start application is launched by means of a launch descriptor called a JNLP file. Enter the URL of the JNLP file in the text field. By clicking on the [...] button you can bring up a dialog which shows the JNLP URLs of all applications which have already been downloaded by Java Web Start. Choose one in the list and press [OK] to transfer the URL to the text field.
• Java VM
  Choose the Java VM to run Java Web Start and the profiled web start application.

Note: Java VMs are configured on the "Java VMs" tab of JProfiler's general settings which are accessible by clicking the [General settings] button on the bottom of the dialog.