Hi,
Seems that the links on the MStudio reference got somehow corrupted. Probably the best way to go here would be to try to repair the installation. If you go to the control panel and Add/Remove Programs you should see there the MStudio entry, click change and the installer should find the current installation and give you the option to repair it. If this does not work then probably the only way to get the help back up will be a reinstallation of MStudio.
I hope this Helps,
Juan Carlos
National Instruments