Description
Due to a problem in the Quartus® II software version 11.0 and later for Linux, if the MegaWizard™ Plug-In Manager is opened from the command line (qmegawiz), it will exit with an error when the IP MegaStore™ link is clicked.
Resolution
To workaround this problem, open the MegaWizard Plug-In Manager from the tools menu of the Quartus II GUI.
This problem is scheduled to be resolved in the next release of the Quartus II software.