MySQL Installer Guide
Known limitation: The upgrade
process does not reconfigure the
keyring_file_data option,
because the upgrade process does not regenerate or overwrite the
current configuration (my.ini) file. The
keyring plugin is new as of MySQL
Server 5.7.11, and is enabled by default, but it requires a
valid keyring_file_data definition. In MySQL
Server 5.7.11, keyring_file_data is set to an
invalid (INSTALLDIR) location on Windows. To change it, you can
either manually change the setting in
my.ini, or click the
link in the Installer
dashboard for your MySQL Server installation to regenerate the
my.ini file from scratch. The Installer
sets it to "%PROGRAMDATA%/MySQL/MySQL Server
5.7/keyring/keyring".