(8 hours ago)tom alphin Wrote: It's likely there is a problem in some step like "Check for Library Updates". If this were buggy, maybe it needs to be fixed at an installer or app level. It is also possible that, for some reason, those subparts aren't getting included in the Unofficial Parts .zip file.
Try downloading the complete.zip from the latest update and replacing your LDraw directory with it's contents. If that works then LDView isn't downloading updates as it should (which may be a problem with the LDraw server, LDView, or both).