Microsoft .NET Framework 4.5.2+ : Download
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We have a short video tutorial here walking through the installation here. The irony is that it's recorded for Sitecore version 7.x which is no longer supported. ¯\(ツ)\/¯
The SPE module installs like any other for Sitecore.
Download the module from the GitHub releases page and install through the Installation Wizard.
Following the installation you'll find these new items added to the Sitecore menu:
Sitecore > PowerShell Console
Sitecore > PowerShell Toolbox
Sitecore > Development Tools > PowerShell ISE
Sitecore > Reporting Tools > PowerShell Reports
You may also clone the project from GitHub and compile it. This allows you to access the latest functionality without waiting for a new release. See the following contributor guide for instructions on how to get up and running.
See the troubleshooting section here