I got this message: "If you change a file name extension, the file may become unstable." What do I do?
I's possible you have the extensions visible (e.g., ".txt" in "somefile.text"). File extensions tell your computer which program should be used to open a particular file. To rename your file properly, do the following:
1. Click the "No" in the message box that appeared so to not save the change you made.
2. Follow the instructions in the tutorial again. This time don't delete the last 3 characters after the dot."