I have taken a look at a few different paths, and it seems like there could be a few reasons for a missing control in the palette.
Are you using an evaluation version of the Home and Student Edition? This could cause some functionality to be missing.
If that is not the case, I would recommend you try a reinstall of LabVIEW, because a corrupted install might cause behavior such as a VI being misplaced. If even that does not work, take a look at this article: