DirtFarmer wrote:
Windows or Mac?
Either way, your photos are not IN Lightroom. The LR catalog has a list of where they are located on your computer. Stopping use of LR will not move the photos.
File Explorer (Windows) or Finder (Mac) should be able to find your photos. If you look at a photo on LR, it should tell you the file name. And in the Metadata panel it should tell you the folder where the photo is located.
How many photos have you collected in your 15 years?