While PhpStorm 2017.2.2 (Build 172.3968.35) was officially released by JetBrains on August 31, 2017 , the specific build number 172.4155.25 is not an official public release from the JetBrains archives .
What You Can Do Legally
allows you to manage and install specific older versions side-by-side with current releases. Licensing Information
Security Risks: Unofficial builds frequently contain malware, keyloggers, or backdoors.
Official Downloads: You can find all verified previous versions in the JetBrains PhpStorm Other Versions archive .