The upgrade tools do not copy comments from the existing installation to the new installation.

If you removed a setting or a block of settings from a configuration file in the config-store directory, the upgrade tool preserves your changes by removing the setting or block of settings from the new installation and records the removals in its log file. To re-add a setting or block of settings to the new installation, compare the configuration file found in the new installation to the file found in the product distribution .zip file and make your changes.