WordPress 4.2.7

I am interested in whether or not this plugin works with WordPress version 4.2.7.

It won’t, no, because it requires the WordPress REST API infrastructure introduced in WordPress 4.4

oh, anyways thank you for your answer

btw I heard a while ago that you are planning to include version 2 in the WordPress 4.5 release. Is that still the plan as of today?

No, v2 won’t be included in WP 4.5

v4.6, v4.7 or some future but unknown version?

Unknown at this time