WHMCS 5.3.4 is now available to download.

This release contains scheduled maintenance improvements and other fixes for the 5.3 series.

For a full list of changes, please refer to the changelog @ Changelog:WHMCS V5.3 - WHMCS Documentation

You may download either an incremental patch set (only for 5.3.3 upgrades) or the full file version (valid for upgrading any previous version or for new installs) via our Downloads Page.

Download: Download WHMCS

Changelog: Changelog:WHMCS V5.3 - WHMCS Documentation

Release Notes: Version 5.3 Release Notes - WHMCS Documentation
این نسخه پایدار بوده و میتونید بهش آپدیت کنید
لینک دانلود مستقیم نسخه اورجینال whmcs 5.3.4 رو هم تا چند دقیقه دیگه میزارم