BTW going back to Add/Edit Models and selecting the correct model didn't help. Neither did closing one or both models. Exiting DWX and opening it again did fix it, but I have no idea what I did to confuse the program.
In the tutorials they say you can choose to advance/navigate with either the arrows or the buttons, but sometimes this confuses both the program and myself.
I would assume the back/previous button would take you to the last screen you were at, but sometimes it brings up a completely new screen!! or sends you back to the welcome screen! Sometimes DWX skips a subscreen when you select next and the only way to get to it is using the previous button.
EX: from FORM ► opens RULES TREE, then◄ opens RULES EDIT selection (skipped for some reason), then► opens RULES TREE, then► opens RUN MODEL selection, then► opens RUN FORM, then◄ opens WELCOME (not where I wanted to go!), then I try selecting the direct navigation buttons and I am stuck on the WELCOME screen.