DO NOT mix the PlugIns and IrfanView bit versions.
Note: Install 32-bit PlugIns to IrfanView-32 and 64-bit PlugIns to IrfanView-64 folder. PlugIns will be installed into IrfanView 'PlugIns' directory.Click on the PlugIn file (irfanview_plugins_XYZ_setup.exe).
Please always use the current IrfanView and PlugIn version.