Failed to launch MegaWizard™ Plug-In Manager. PLL Intel® FPGA IP v18.0 could not be found in the specified library paths

In the Quartus® Prime software version 18.0, when you want to open the MegaWizard™ for editing, you may see error message "Failed to launch MegaWizard™ Plug-In Manager. PLL Intel® FPGA IP v18.0 could not be found in the specified library paths".

To work around this problem,

1) Locate the .lst file of the missing IP in your Intel® FPGA program directory. For example, for the missing PLL, locate "pll_wizard.lst".

In the case of Windows:

Windows <installation_directory> \ip\altera\altera_pll

In the case of Linux:

Linux <installation_directory>/linux64/ip/altera/altera_pll

2) Change the text.

"<ALIAS>Altera® PLL v18.0</ALIAS>"

to

"<ALIAS>PLL Intel® FPGA IP v18.0</ALIAS>