This is definitely going to be a wasted comment, but the new scenes mentioned in the change log are when comparing the game to v1, which was from 2017. Those (35) new scenes are literally every scene that has been added to the game in the updates up until now. To reiterate, there are
no new scenes between v2.15 and the newly added v2.18. This new update more than anything is just a public release, since the last public release looks to be v1 from 2017. Those who can't read apparently and keep comparing 2.18 to 2.15 are not going to find any new content, although you're free to keep playing "I spy," but keep in mind that in literally v2.16.4, the change log states that his goal was to upload this online for free (hello v2.18).
Is there any completed save file? my save is lost and i dont want to play the whole game again
Play the game, you don't need a save. The game, without using the cheat feature that is included in the game, can be completed in under 20 minutes. You can also just use the cheat feature and bypass the game and unlock all the scenes. Unless you're playing the game to experience the cobbled together story, which I doubt, just spend the 20 seconds literally to use the, again,
included cheat feature.