EditPlus is one of the popular text editor as it supports many text formats starting from .txt, .html, .perl, .py, .java etc
Backup file [.bak]
Every time we save a new file, EditPlus creates a backup file with extension format .bak, for some this might be useful in case the file got deleted or damaged, they can get the content from the respective .bak file, but for some this might just not needed.
Enable/disable Option
We can enable or disable creation of the .bak file while saving a new file in EditPlus, this will be under
Tools | Prefernces | File
To create back up file each time you create a new file, Check the Create backup file when saving
To disable this creation of backup file, just uncheck the option.