...
Download the previous Studio version made for your IDEA version. To get a version >= 9.1 or newer of the plugin, dowload download the ZIP from https://plugins.jetbrains.com/plugin/19984-pricefx-studio/versions. Even older Older versions can be downloaded from Builds (Pricefx Studio).
⚠ Download the ZIP to your download directory. Do not unzip it!In the IntelliJ IDEA Windows version, click File and select Settings.
In the Mac version, click IntelliJ IDEA and select Preferences.Open the Plugins tab.
Search for the plugin called Pricefx Studio or pricefx-studio-idea and click Uninstall.
Click the Tools icon > Install plugin from the disk and choose the ZIP from the first step.