When I created a new save, it says version 0.65, but I was wondering if I can keep my data from version 0.6 and use it in the new version (0.65). Or is it a visual glitch and the save files from 0.6 has 0.65 content. Or is it not possible.
The save version is just an indication of the game version that you used to make a save. That's it. Of course you can continue using your older saves. That's the point.