My pictures show up in LR, but I cannot develop them. I have erased images from the card. I have found the folder, but it wants to relaunch. What will happen with that?
I don't know what it means when you say "it wants to relaunch". What are the exact words or error message?
If you photos show in Lightroom but you can't edit them, its because you have moved or renamed or deleted the photos (or the folders that contain them) outside of Lightroom. (Hint: don't do that)
To fix the problem, you need to reconnect the photos inside of Lightroom, follow these instructions: Adobe Lightroom - Find moved or missing files and folders