${INSTALL_DIR}/client/intellij12/plastic4idea.jar
For everyone coming to this after a google search: This file is only created when the IntelliJ Plugin installation was chosen in the Installer.
Btw. the only way to obtain the "plastic4idea.jar" is to completely uninstall and then reinstall PlasticSCM with the installer, find your Rider Installation directory by using the world's smallest File selection window, just to get a single jar file.
Generally it is ridiculous and unprofessional, how hard it is to install a VCS plugin for my IDE, I googled for like 30 minutes and did not find a single download link, just some obscure forum threads, with outdated documentation and outdated installation information. Please just put it in the Plugins Repository of IntelliJ or at least provide download links for all the plugins on your website.
