If anyone is having problems using their S61 Mk1 in controlling Reason I can confirm that the information on this link works. https://keramsbookreport.com/index.php/2020/07/23/how-to-make-reason-work-with-ni-komplete-kontrol/
The only transport control that does not work is Loop, which is no big deal; although for some strange reason it is light up. (No pun intended). So RWD, FFW, PLAY, REC and STOP all work perfectly. This is great news as I was on the verge of buying another midi controller. It would be interesting if this also work on Mk2 and possibly Mk3? Onward and upwards. Anyway I hope this helps anyone else who would like to use their S Keyboard to control Reason.