Due to a problem in the Quartus® Prime Pro Edition version 15.1, the "Update Memory initialization files" option has been removed.
The Quartus Prime Standard Edition is not impacted by this problem.
To update your memory initialization files in the Quartus Prime Pro Edition version 15.1, perform the following steps:
1) Create a tcl file in your project folder containing the following:
load_package database_manager
load_package qhd
project_open <Project name> -revision <Revision Name>
load_db -writable -snapshot final
update_mif
commit_db -snapshot final
2) Execute the following command via command line:
quartus_cdb -t <filename>.tcl
The "Update Memory initialization files" option is scheduled to be reinstated in a future release of the Quartus Prime Pro Edition.