In GC2 we could "obsolete" ship designs. Unfortunately, if you really wanted to "update" the design and hit the "obsolete" button by accident, there was no way short of reloading a previous save of the game to reclaim the design. There are many other things where being able to reclaim something deleted or "obsoleted" by accident can only be accomplished by a reload. SD, please do all you can reasonably do to make this irritant go away in GC3.