More than 20 years after the end of NASA's Compton Gamma-Ray Observatory mission, the data collected by its COMPTEL telescope provide still the most comprehensive and deepest view of our Universe in MeV gamma rays. While most of the COMPTEL data are archived at NASA's High Energy Astrophysics Science Archive Research Center (HEASARC), the absence of any publicly available software for their analysis prevents confronting them to the scientific advances made in the field of gamma-ray astronomy at higher energies. To…