Have you checked whether the Memory protect is on? What does it say when it won't let you save a UPS?
Don't forget, UPS's are just SET LISTS... If you want to save a customized setup (registration, UPG), you have to save it to the UPS, then save the UPS. Save as a UPG.
If you get that done, you can then specify that particular UPG to be your Startup registration, too. It's all in the manual...
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An arranger is just a tool. What matters is what you build with it..!