Check the list of questions in the FAQ section here https://appsaecdesign.com/faq_solarcheck

1. When launching the add-in for the first time, you must agree to load the SUN_Target family.
2. Place the SUN_Target object on windows/walls using the Component command.
3. Prepare a 3D view – set Sun Settings to "Single Day" on the selected date and time range.
4. Elements that remain visible in the view will be considered in the analysis (hide any unwanted elements).
5. Run the application. The first step is to select the chosen SUN_Target (or multiple at once) and confirm the selection
6. The analysis will be performed after pressing the RUN button.
7. The analysis results will be written into the parameters of the SUN_Target and the window, if the Target was "attached" to the window.
8. Graphical results in the form of spatial and flat triangles will be generated in the project and will also contain information about the specific sunlight exposure area.

The application installs in the add-ins directory for Autodesk® Revit®:
“C:\ProgramData\Autodesk\Revit\Addins\202#\SolarCheck”.
Uninstallation is done in the standard way: go to the Control Panel, find the SolarCheck application (right-click), and select Uninstall.