I have same problem.
IN prefferences the vst scan runs better than with manual scan.
But it crashes at Kinetic metal from Native Instruments. I cannot remove that plugin because in Fruity loops it works.
I dont understand why it crashes when scanning a vst folder while other programs ( fruity loops dont(.
From what I tried the Cakewalk like it more than Fruity loops and I would like to switch to Cakewalk
But Cakewalk have some problems. Like fewer vst instruments available form the same directories.