To install the Pricefx Studio plugin:

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When a new version of the plugin is released, IDEA will check during startup and offer you to update the plugin version.

Troubleshooting

If you connect to a custom Pricefx server, you might get an error message "Unable to find valid certification path to requested target":

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cd "c:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 2017.1.4"
bin\keytool -importcert -alias pfx -keystore jre\lib\security\cacerts -file pfx.der

Then enter "changeit" (without the double quotes) as the password to the JRE cert store.