VSampler by Speedsoft (code written by Michael Zschoerper aka “Maz”) was bundled with Cakewalk Sonar in 2004 and discontinued updates 2008
It had a deep feature set, in some ways, on a par with Kontakt.
VSampler still works fine in Gig Performer with JBridge.
(I also use Kontakt, but I can do things with VSampler so fast, and many songs are now setup on it… hard to let it go)
I might look into transitioning to another Sampler before it really leaves you in a lurch (maybe be thankful you got this heads up now to make the move). Just my $.02, FWIW.