From your download area, download the plugin file (e.g. SysML_Plugin_190_sp4_bundle.zip).
Extract the downloaded file to the same directory where your modeling tool is installed.
Start the modeling tool. The plugin is applied to your modeling tool.
Note
If you have a plugin bundlean All-In-One-Pack (.rdzip file) with all plugins bundled, for the information on how to install it, please see Resource Manager.
Tip
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Getting help
If you run into any installation-related problems, try the following: