We are now almost done with a project here that used a top-down assembly (skeleton), and have had TONS of lost work and problems because Windburn refuses to actually update the parts referencing the assembly, or worse, updating the skeleton that drives everything. This is totally absurd. We've found here that sometimes it's more robust to do an update, not in windburn, but while in the part or assembly. Of course, sometimes even THIS does not work, and worse, doesn't show in in the workspace that it's out of date, leading to HUGE problems. I've found that the ONLY reliable way to make sure you have the latest files is to DELETE ALL the files in question, then re-add them to the Workspace again, unchecking the re-use box.
This is truly pathetic. I should send PTC a bill for all the man-hours we've wasted on this garbage.
I've said it before and I'll say it again: This is, by far, the WORST software I've ever used, anywhere, in almost 30 years of using software. That it's supposed to play such an important role makes it all the more frustrating.