Uninstall
Remove a downloaded model
Settings → Models → find it → Uninstall. Only removes the downloaded model files, the same ones described in The one-time download; Boards, Sounds, Styles, and generated audio stay.
Remove Salience entirely
Mac: use the "Uninstall Salience" app that ships with the download archive; it asks whether to also remove models and cache. Windows: Add/Remove Programs, same question. Boards, imported audio, Styles, exports, license, and preferences are kept either way unless you choose otherwise. Need a Style back afterward? See Reinstalling a Style.