just out of curiosity RWIlliams and DonMusic... what operating system are you running? It has been my experience with other software that different operating systems interpret environment variables used in installation programs differently.

Win 10 here, and after reading this I checked my system.

dllElastiquePro3.dll was in the Realband folder, not in the RealBand/Data folder. Is that significant?

Jeff, you may recall that during testing I was complaining about a long delay even after the yellow "Initializing Accompaniment Functions" message disappeared. After copying dllElastiquPro3.dll to the DATA folder, that extra delay is gone. The style picker is now starting up pretty much as soon as the yellow box closes.