Hi Scott,
If you still need it you can try to run this (as Administrator):
javaws.exe -system -shortcut -silent c:\path\to\project.jnlpjavaws.exe is usually found in c:\windows\system32
project.jnlp is the file downloaded when you click launch on a project. Alternatively you can use those links:
Windowed JNLP: http://IP:PORT/main/system/launch/client/PROJECT_NAME.jnlp
Full-Screen JNLP: http://IP:PORT/main/system/launchfs/client/PROJECT_NAME.jnlp
Applet URL: http://IP:PORT/main/web/applet/client/PROJECT_NAME
Before that you may want to clear the java cache (javaws -clearcache).