Hi,
Chart FX 7 for Java Desktop installer puts the trial the license as a registry entry. If you installed Chart FX with an account that is not administrator or does not have enough pemissions, the installer will not write the registry. Then Chart will look for that entry and if not found will throw the "Couldn't get Run Time license" message. The registry entry you should look is: HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Prefs\/Classes/Root\/Licenses\9cdf80d0-1f77-4ee1-bd2a-c2a8d592345f
So, please log with your administrator account. Domain account not always has the same permissions. unistall your product and reinstall it again.