The RAR-decoder window will be opened automatically by the PAR Decoder window when the PAR window is done checking/fixing RAR files. It will also be opened if you are downloading RAR files without their PAR files. When the RAR window is done, you can find the files it extracted in the folder named Extracted_Files inside the “Downloads” folder, which ezGroups will open automatically.
You can also use the RAR Decoder window in “stand alone” mode to extract files from RAR archives that you download with other programs. To do so, see the instructions on this page.