When using IR Panels make sure the MakeHex Output file is set to Decimal otherwise it will not work.

When importing or pasting RC5 hex codes into ProntoEdit the hex string will still start with 0000. If you want even cleaner codes you need to enter them manually in the 'Button Properties/Action/Add IR' and select the 'Advanced' Button'. Then select RC5 and enter 1 (one) as the 'System Code' and the 'Function Number' from MakeHex which matches the Function you need will be the 'Command Code'. This will give you a hex code that starts with '5000' which will eliminate any Toggle Bit problem.

It is odd it doesn't have ON and OFF seeing it has all those other ones. Maybe they are using a different System Code (Device Number for them) or even using RC5x or RC6 codes. Really need the info from Hitachi.