To install the application run the 4dotsFreePDFCompressSetup.exe.
Press the "Next" button in the first screen.
Afterwards, select the directory where the application will be installed , or simply accept the default one and press the "Next" button.
If you want to compress PDF documents with a right click in Windows Explorer you will have to check the "Integrate into Windows Explorer" option.
After the application is installed you can start it by clicking the 4dots Free PDF Compress shortcut icon on the desktop or by selecting the 4dots Free PDF Compress shortcut from the Windows start menu.
Alternatively, you can select PDF Documents in Windows Explorer and then right click on them and select "Compress PDF Document" from the menu.