Hi Peter,
Error message,inside blue/yellow flashing box is "Cannot load drum style,because this folder does not exist" eg c:\bb\Drums\RockEven8.

I get this with any of the 81 styles listed as being Real Drums compatible,aslo the Real Drums picker is empty
after trying the Rebuild button.

The drum files for sets 1-20 are all there in c:\bb\Drums,so I can't explain this,other than possible new install of the main application?

Regards

Dell Inspiron 5748
iPad Mini.
iRig HD2.
BIAB,RB 2019,Cakewalk,Auria Pro,Cubasis,Garageband,Sampletank.
Lots of VST,DXi and FabFilter Pro Bundle.
Amplitube,BIAS FX.
Behringer MS20 Monitors.
Several guitars.
Always trying to leave the audience wanting less.