Hey thank you for the post Kuzkop.

Offline mode allows RTST to skip querying the Census servers and instead only connects to DGC websocket server. Data it reads has no names, only IDs. I don't think that will help in this case.

If you've added a character before in RTST, you should be able to go under manage and expand your character. It will show you the ID there. I don't think you can directly copy it, we really should make it where offline mode lets you select a managed character though!