Editing an Explode Step (Assemblies) does not work

Works fine for me. Try restarting SW and check.

Also when does it started happening to you?

Scott,

I'm sure you're aware that you have to select the step you want to modify after entering the 'Edit Feature' command. From there you add or delete items from the manager. Depending on the modifications needed you might have edit prior or later steps too. All of this leads to editing the exploded line sketches too.