> For the complete documentation index, see [llms.txt](https://help.arkance-systems.com/pressure-drops/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.arkance-systems.com/pressure-drops/en/general/installation-and-activation/installation.md).

# Installation

Customers can download install media from the [ARKANCE Helpdesk](https://helpdesk.cadstudio.cz/Document), Documents section. To start the installation, double click the *msi* file and than follow instructions in the installation wizard.

The application is installed for all supported versions of Revit. After you start Revit, you will find the application commands in Add-ins tab. When you run any command for the first time, you must enter the license key, see the following pages Activation of commercial and trial versions.