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How to manually install IntelliJ IDEA patch update?

I get the following connection error while updating IntelliJ behind proxy (the proxy ping in IntelliJ is working though):

Connection Error: Failed to prepare an update: Cannot download 'http://download.jetbrains.com/idea/IU-xxx-patch-win.jar': Connection closed at byte 17920. Expected 20941088 bytes. , response: 200 OK Open download page.

Solution?

I was able to download the file ...patch-win.jar via a browser. How can I now install this patch manually for IntelliJ in a Windows environment?

Solution 
  • java -jar IU-xxx-patch-win.jar "C:\Program Files (x86)\JetBrains\IntelliJ IDEA 2017.1"

    (replace with the actual IntelliJ IDEA installation location on your system).