The specific update of brought several quality-of-life improvements and bug fixes to ensure the environment remained snappy and reliable.
Developers relying on older, unmaintained plugins might find that those plugins only work with specific, older IDE builds. Installation and Licensing Notes
You can download PhpStorm 2017.2.2 Build 172.4155.25 from the following links:
Safe deletion, variable extraction, and namespace organization.
The safest and most reliable way to obtain older versions of PhpStorm is through the official JetBrains "Other Versions" archive