What do you mean if Dahua Tool Manager can't be opened after downloading? Dahua Tool Manager can't be opened after downloading. You can uninstall it and reinstall it in the next one. Dahua tool housekeeper can't open it after downloading, which is caused by incorrect installation. You can unload Dahua Tool Butler and start over. Open it. So Dahua Tool Manager can't be opened after downloading. You can uninstall it and restart it in the next one.