The 'basic cube' shape in my 'basic shapes' tool bar is not there?

Hi forum,
So I was messing around TRYING to making my project neater by using folders for my Assignment meshes, materials etc… and somehow the ‘basic cube’ mesh has disappeared from the toolbar where all of the basic shapes are, I was going through my meshes and finding them in the browser and then moving them to the relevant folders, when I realised I found the cube and tried moving it back but now it is not appearing anywhere please help !!!

Note: When I load my projects up every project has this problem, each project says it cant find the cube and all of the cubes that were there before have disappeared from the play area.

SOLVED- If anyone has got this problem by making this mistake just get a newer version, I tried my programs in 4.10 and everything seems fine now, I’m sure there’s another way but that was a quick fix.