As far as I know, delete/re-create is the only way to "reset".
It's a pity that there's not an output (or some other way to see the learned Ths/Tcs values, other that watching monitoring to see how early the target temperature switches), that the learned values are not "resettable", and that there is no Stop input on the IRC, to prevent "learning" of values when equipment in offline or seasonal. Because of these, we usually just measure the heating/cooling rates and use constants.