Previous releases should generally not be used. However, if there is an issue with upgrade to the latest version, you can manually install previous version.

1. Download the older previous Studio version to your download directory, do not unzip.
2. In IntelliJ IDEA Windows version, click 'File' and select 'Settings'. In Mac version, click 'IntelliJ IDEA' and select 'Preferences'.
3. Open the Plugins tab.
4. Search for "pricefx-studio-idea" and click "Uninstall".
5. Click on "Install plugin from the disk..." and choose the ZIP from first step.

IntelliJ IDEA 2017.3

• 173.1815

IntelliJ IDEA 2017.2

• 172.1814