PhpStorm fails to start after in-place upgrade: safe rollback without losing settings
Situation After an in-place PhpStorm upgrade, the IDE no longer starts reliably, and I need to return to the previous build. My understanding is that JetBrains stores configuration, plugins, caches, and logs in version-specific directories (e.g., ~/.config/JetBrains/PhpStorm<version> on Linux, with equivalent paths on Windows and macOS), so the prior v