The alpha version of ANOVApower has been transformed into Superpower together with Aaron Caldwell. The new GitHub repository is at: https://github.com/arcaldwell49/Superpower. An extensive manual for Superpower can be found at: https://aaroncaldwell.us/SuperpowerBook/. ANOVApower will not be updated. All future development will happen at the SUperpower site.
The manuscript introducing Superpower can now be found at: https://github.com/Lakens/Simulation_Based_Power_Analysis_For_Factorial_ANOVA_Designs