Is it safe to edit cryptographed files with Notepad++?

[Miguel Angelo Santos Bicudo]

I am using Windows 10 and I have enabled cryptography in a folder. All files saved in there are automatically cyphered. I know that Notepad++ saves files being edited in a backup file so that if something bad happens it can recover. Also, closing and reopening Notepad++ will restore edits to files that were not saved. Will this expose my secured files?