Avogadro-1.2.0n-win64.exe

for 1.2.x still:

Installing Avogadro from the Avogadro-1.2.0n-win64.exe file is a straightforward process: avogadro-1.2.0n-win64.exe

— If legitimate, Avogadro 1.2.x is stable but old (last official 1.2 release ~2016). Modern version is Avogadro 2 (LibAvogadro). 1.2.0n might lack recent file format support or bug fixes. avogadro-1.2.0n-win64.exe