OK, to clarify:
- conenct flirc to PC, lauch flirs front-end
- select appropriate controller (e.g. XBMC)
- click on erase button in fron-end
- click on remote button I want to remove from configuration
- program this button again with desired key...
Regarding loosing the configuration; I know that actual setup is written to flirc, but there is no 'backup' of it on PC (e.g. file that can be used to reprogram flirc without doing all selections key by key). So I have nothing to load to front end on PC to be modified. What I was affraid is that I'll need to erase entire configuration from flirc, make new setup on PC (from scratch) and then save it to flirc... This woul dbe troublesome as I'd need figure out how my XBMC setup (slightly modified) is done and how my harmony emulation is set up for XBMC remote... But if only one key can be reprogrammend using above procedure that it is easily manageable.