To make it easy for PC users to be able to quickly choose a preferred app (eg; Text Editor), to open/edit the batch file on demand, you can add the Open with option to the context menu of .bat files.
The best way to protect your files is to place them inside a secure disk image. This is shareable with other people, but they will always need the password that you add to open it. A disk image ...
If you want to open JPEG-XL image files on Windows 11, install the JPEG XL Image Extension from Microsoft to enable JPEG-XL ...