Delete old experiments

previously I had my database of experiments broken when trying to transfer between computers… i abandoned using the software because I essentially lost my whole lab book. I want to try to give it another shot with the plan of only using it one one computer/hard-drive instead of dropbox like before and syncing over devices which previously caused issue. However all the headers for old experiments/protocols are still there but nothing in the documents. I delete them and when I close the program + reopen they return again.