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6 プラグイン
WP Rollback - Rollback Plugins and ThemesWordPress.org のプラグインやテーマのバージョンを、ロールバック(または更新)します。- このプラグインに WordPress.com との互換性がない理由
WP Downgrade | Specific Core Versionバックエンドから直接、WordPress の目的のバージョンに自動的にダウングレードまたはアップデートを行うことができます。 
Core RollbackSeamless rollback of WordPress Core to latest release or any outdated, secure release using the Core Update API and core update methods.
DowngradeDowngrade WordPress
RIS Version Switcher - Downgrade or Upgrade WP Versions EasilyEffortlessly switch between WordPress core and plugin versions for compatibility, troubleshooting, and testing.
Version HopperEasily switch between versions of your WordPress plugins and themes directly from the admin dashboard.