My guess is that you have to save the program to the user bank first ?
That’s how I understand it - save first. But you have double of every patch, User 413 is the same as Factory 413 and therefore you can overwrite it and still have access to it with Factory 413.
How to Load a SysEx Patch to Any Program Slot on Prophet 5/10When you send a SysEx file to the Prophet-10, the patch usually loads into the slot it was saved in (e.g., Bank 1, Program 3 ). But there are simple ways to place it wherever you want.
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Option 1: Manual Save on Prophet-10
1. Send the SysEx file using a tool like SysEx Librarian (Mac) or MIDI-OX (Windows).
2. The patch loads temporarily into the synth.
3. Press “Write” on the Prophet-10.
4. Choose the bank and program number where you want to save it.
5. Press “Write” again to confirm.
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Option 2: Use a Patch Manager or Editor
Use software like:
• SoundTower Editor
• KnobKraft-orm
With these, you can drag and drop patches into any slot and send them to your synth easily.
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Option 3: Edit the SysEx File (Advanced)
If you’re comfortable with SysEx data:
• Open the file in a SysEx or Hex editor.
• Change the bytes that define the bank and program number.
• Then send the file to Prophet-10.
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Tips
• Prophet-10 uses MIDI SysEx ID 01 01 0C
• Always back up your patches before overwriting
• Use User Banks for more flexibility