I have just downloaded Lightroom CC. I have been using Lightroom 5, which I purchased a few years ago.
My photos and presets are now in CC. Does that mean I can delete the LR 5, and ther will be no impact on my files?
Yes. Suggest you give it a few days. Make sure you are happy with everything and then uninstall LR5 via the Windows Control Panel. On mac OSX there is no installer for LR5 so just send to the trash.
Retrieving data ...