Setup file is a self-extracting archive that must be downloaded and opened on the machine where you run Google Desktop Search. Google Desktop Search must be running during installation. It is recommended to install IFilters you will be using before installing IFilterShop Google Desktop Search plugin. During installation you will be asked to enter list of file extensions that should be indexed by this plugin. This list will be saved in "extensions.dat" file.
If you need to change this list after installation you can either reinstall the plugin or:
1. Go to the directory there IFilterShop Google Desktop Search plugin was installed (C:\Program Files\IFilterShop\IFiltershopGdsPlugin by default).
2. Edit "extensions.dat" file in any text editor using space as separator.
3. Unregister IFiltershopGdsPlugin.dll using regsvr32 /u IFiltershopGdsPlugin.dll command.
4. Register IFiltershopGdsPlugin.dll using regsvr32 IFiltershopGdsPlugin.dll command.