If you're reading this message the MIDI system is not properly initialized. Probably you did not allow MIDI access, are not using Chrome or don't have the Jazz-plugin fallback installed (or you are on a mobile device) Please install the Jazz-plugin from here: jazz-soft.net
Or enable plugin access and try a refresh.
If you want to download the small sysex files which allow the settings to be set offline from a PC/Mac program like MIDI-Ox or Sysex Librarian, you can download them here
Updating to this firmware will keep other firmware's settings in RK-002 memory.