After running MakeHex, you might want to use either IrPanels or Hex2CCF to convert the output of MakeHex into a CCF file with numbered buttons.

A CCF file with numbered buttons is easier for the importing tools of some remotes whose software can handle pasted in Pronto Hex but drag/drop from a CCF is faster.

If you have an actual Pronto, merging a CCF with numbered buttons into you config makes a good test config for finding out what all the numbered functions do. And/Or it may be easier to make the real buttons on ordinary panels be aliases for the numbered buttons rather than copy the Pronto Hex strings.