Unlike some other presets, InDesign doesn't automatically store your preflight profiles. You have to export the profile yourself and back it up.
I hope you still have your version of CS5 still installed. Open it up. Open up the Preflight panel and choose Define Profiles. Select the profile you want to export, and click the little menu shown below and choose Export Profile.
Then open up InDesign CC, open the Preflight panel are repeat the process except choose Load Profile from the menu and import it into InDesign CC.