I would like to make a simple observation. To create or open a key file, the extension called ".keepasskey" is mandatory. In fact you cannot choose or create a different extension. For this reason it is very easy for an attacker to locate the enpass key file. For this reason, to keep it archived I have to rename it, and then when I need it I have to rename it again by adding the ".keepasskey" extension.
Wouldn't it be a good idea to be able to create and open the file without the extension?