From Archicad 25 The RFA & RVT Geometry Exchange is a part of the Archicad installation, you don’t need to download a separate installer.

The RFA & RVT Geometry Exchange for Archicad enables  Archicad  users to import RFA (Revit Families) into their  Archicad  project as objects including doors and windows.  It will also enable  Archicad  users to hotlink, import and export RVT geometry (Revit projects) in and out of  Archicad.  
This is intended for comparing imported RVT geometry to an  Archicad model and exporting RVT geometry for comparison to a Revit model. 
Installation of RFA & RVT Geometry Exchange for Archicad 24
| Download | Language | Windows | Mac OSX | User Guide | Last modified | 
| RFA & RVT Geometry Exchange for AC24 | 90.8 MB | 102.8 MB | Dec. 14, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 95.2 MB | 107.9 MB | Dec. 14, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 14, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 14, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 14, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 21, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 21, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 21, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Dec. 21, 2020 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.7 MB | 102.8MB | Feb. 05, 2021 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.8 MB | 102.8MB | Jan. 12, 2021 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.8 MB | 102.8MB | Jan. 12, 2021 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.8 MB | 102.8MB | Jan. 13, 2021 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.8 MB | 102.8MB | Jan. 13, 2021 | ||
| RFA & RVT Geometry Exchange for AC24 | 90.8 MB | 102.8MB | Jan. 13, 2021 | 
You can download installers for previous Archicad versions from here: https://www.bim6x.com/rvt-rfa-addon