Avogadro 1 is not under active development, the repository was archived in September 2021. Development of Avogadro 2 is being done at https://github.com/openchemistry/avogadrolibs. Avogadro is an advanced molecular editor designed for cross-platform use in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas.
Archivo->importar->Crystal->Elements->Ag-Silver.cif->Insert Then Preferencias->Barras de herramientas->Crystal View Options->Miller indices-> Crash
Here is the video https://www.dropbox.com/s/flvtfhdn60pai42/avogadro.mkv?dl=0
Glad to help