Announcement post for the fixed version says the disc title was updated to 4.1:
http://nestring.blog.fc2.com/blog-entry-27.html
Crossfade demo calls it "NestringII (Ver 4.1)":
http://nestring.blog.fc2.com/blog-entry-28.html
Both posts were published before the C84 release.
(The first post also mentions that Shiuya P was thinking about adding a "seal" to the new version to differentiate it from the old one, which is probably what the blue dots on your copy are yeah.)