Source for preflash unclear

This page says "If step 4) below fails, you need to re-program the factory example code into the flash. Click here for instructions." and clicking the link goes to this page which says "You can find the source code and the project file of the example in the following folder: <InstallFolder>\examples\peripheral\preflash".  It is not clear/evident where to find the folder described.

Please advise as to where I can find the factory example code to reflash the DK.