Just a quick'n'dirty hack for cleaning the kit from unwanted amount of reverb. BE AWARE that this will alter the overall sound of the kit.
But thats exactly why you are here.
Select all channels for editing by holding SHIFT and clicking EDIT ALL CH
Select reverb parameter for editing by clicking REVERB
Reduce the amount of reverb by turning the DIAL to zero
You can try out the sounds now
Save the kit by holding SHIFT and clicking STORE KIT
Now you can choose the slot. If you want to save to the same slot just click STORE KIT
Done
If you miss the reverb on some of the drum sounds, you can edit these one by one by exiting all channels, selecting a channel you want to edit and adding the amount of reverb. Don't forget to save.
For more information please read the manual and this thread: nord-drum-forum-f27/nord-drum-3p-is-very-noisy-t12780.html