I can also say that next few weeks The Enigma Protector will be updated very often due to numerous of new improvements (note, I'm talking about improvements, not bug fixes).
Regarding this change - this is similar with Enigma Virtual Box. In previous version all virtual files were available for read-only access. Any write file operation failed. Now, application can write virtual files without problem. This is good if your program creates some temporary files for eg, or creates a database files etc.
The difference are quite internal, and I do not want to share these changes, say, it is company secret They are mainly related to the code virtualization.