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.
When I have an open project and start a new one, if I first discard the previous project, I cannot add any element in the second project
![Screenshot (144)_LI](https://user-images.githubusercontent.com/32045231/108242870-18ac4000-7156-11eb-90fa-f7f89bb727dc.jpg)