Not sure about others, but I feel that the bird would be better for bringing in new users who made not be as tech inclined versus the folder. The name “kbin” already has some tech connotations to begin with. For the average user, thinking of a bird when they see the app would probably be better versus the windows file explorer or some MS office/development app. The folder icon doesn’t have to be trashed though, as stated, they can coexist.