There are many ways you can install ABR files into Photoshop. Extract/unzip the folder and then do one of the following:

1. Right click on the ABR file and choose to "Open in Photoshop"
2. Double click on the ABR file and it should open in Photoshop or...
3. Drag and drop the ABR file into Photoshop, or...
4. Open the Photoshop Brushes panel window and click on the top right drop down menu and select "import brushes" then find the ABR and click ok

If successful, any one of the above methods should result in the brushes being loaded into the Brushes panel (not the 'Brush Settings' panel)

More help is available here: GrutBrushes.com/help

Thank you!

Nicolai 
GrutBrushes.com

