What about putting all blueprints in the blueprint library. Each blueprint has a location (current save, current user and current server), which can be filtered, and copied to any other location. In the library view, you have a user specified (directory-like) tree structure, with blueprints, folders...

Game hard crashed when I was playing a multiplayer game and my internet died. Log attached, though it doesn't seem too helpful

Oh wow people outside of physics/engineering who know how to typeset equations properly! Nice one Posila!

From Australia to California, no surprises here