To get a .hppgrm onto my Prime, I find I have to
- Drop the .hpprgm file into the "<Me>\Application Data\HP Prime" folder.
- Fire up the emulator.
- Fire up the Connectivity Kit.
- Connect the calculator
- In the CK, open the emulator's copy of the program and copy its text.
- Also in the CK, create a new program on the calculator and open it.
- Paste the program text over the default program text and close the editor.
- Click "yes" when it asks if you want to save the program.
This procedure is overly complicated and crucial parts are undocumented. I really, really hope I'm missing something.