Follow normal installation procedures to install IJFR on a Windows computer. However, because IJFR is designed to hook into the OS, there is not a traditional .exe file installed. The only file installed is a .dll file. This is normal.
IJFR is not run like an application. It is always available to you with a simple right-click on a selection of RAW file(s) or a folder of RAW files. When the context menu pops up just selected Instant JEPG from RAW from the Context menu and choose the settings you wish from the displayed dialog. Then click on Extract. it is that simple and fast.