User Guide

Select which category's images should be regenerated, indicate whether
the previous thumbnails should be kept or not, then click "Regenerate
Images".
Database
You can change your store‘s database settings if you need to change your
database server, or if you change the configuration access to your
database. However, before making any changes, be careful and do all the
necessary checks, or ask your host. These changes are required only if
you changed your database settings at your server level.