Welp, you’ll probably all be happy to hear that my problem has been solved!
I updated Reaper and accidentally deleted DecentSampler, in doing so I discovered I must have been running an older version. Now I’m up to speed on version 1.0.12 and all the knobs and sliders on NFO library are working! Lubbly Jubbly!
As you can maybe imagine I’m Buzzing! It’s such a lovely sounding library and I’m sure it’ll be appearing on many of my upcoming tracks.