If you want to keep editing your Motion Maker app while you test it in your installation, you can save it as a draft. Drafts can be played in your LUMOplay software, but they will have a watermark.
You can open your draft in Motion Maker and continue editing it until you're happy with the effect.
You can find your Motion Maker drafts by logging in to LUMOplay.com and going to My Account > Motion Maker Drafts.
Selecting a saved app enables you to view the last revision date, as well as edit the draft. Any new changes to the file can be saved for further revision at a later date, or can be finalized and purchased (Playground) or immediately added to your app library (Playmaker).