Remember this is a project under construction. Moreover, it deals with the most valuable things you have, your files. You did put much effort into your files probably, so keep them safely. You should backup regularly, using a different storage medium. Note that JE can keep several backups or create a daily backup into a user chosen directory.
So here is the usual disclaimer.
I will not be responsible for any damage the editor does to your files, your system or any other damage. I do not even claim that the editor works as expected. I cannot guarantee that your version of the editor is free of Viruses or Trojan horses. All I guarantee is that I did not include such features into the editor by my best knowledge. Of course, I did my best to make this editor useful.