I did export to CSV, which created the file, then I made some changes, and then tried to import it back. The software asked, do I want to replace the current file, and I said yes. And then it said it can't read the first item in the CSV that I just saved and erased the 65 sites I just entered. In my particular case, it said it could not read the named range.
All those sites were added in the program. I selected "Export", it created a CSV Excel sheet. I made one change to a range and saved again, and tried to load and got the error. Not sure what I did wrong. As far as I can see, I did nothing wrong. I edited the range in the exported version and the error was in the name of the very first entry.