If I create a PCB only (no schematic) and draw a ratline, there seems to be no way to delete it. They do show up in Design Manager, but double clicking or pressing Delete does nothing. What's more, if you don't make a ratline, but make a track and then delete it, the ratline remains with no way to delete it. On a related note, the checkboxes in Design Manager seem to do nothing for me. I can't hide components or nets by unchecking the box. I can't tell if I'm doing something wrong, if it is browser-related, or just an issue with EasyEDA. Thanks.