P6 Professional ClickOnce installation performs the following:
ClickOnce Prerequisites
You must have administrator privileges on your machine to install some prerequisites through ClickOnce . If you do not have the required version of .NET and do not have administrator privileges on your machine, then the ClickOnce installation will fail and you should contact your system administrator.

Prerequisites:
Note: ClickOnce is only supported for Windows operating systems.
Installation Scenarios
Installing P6 Professional for the First Time
If you have never installed P6 Professional, click Install 64-bit to begin P6 Professional ClickOnce installation. ClickOnce installation will check and install any missing prerequisites before beginning installation.
Upgrading P6 Professional with ClickOnce Installation
If you have installed P6 Professional with ClickOnce installation, you will be notified when a new version is available. Click Install 64-bit to proceed with the upgrade.
Working Offline
If your administrator has enabled the option to work offline, you can continue to work when you are not connected to the P6 Professional Cloud Connect Database. After you have installed or upgraded P6 Professional with ClickOnce, you can create a P6 Professional Standalone (SQLite) database, work in P6 Professional, and then upload the changes to the P6 Professional Cloud Connect database.
Version: 22.12.11.48446