Hello! i saw on wordpress that there is a 1.5.0 version of this theme? what are the differences? i was also wondering how do i update without losing all the progress i’ve made on the site so far?
Changelog can be found here: https://colorlib.com/travelify/wp-content/themes/travelify/readme.txt
It depends what you have changed in theme. Theme setup done via Theme Options won’t get lost since they are stored in database. Content and widgets will still be there.
If you changed actual theme files (HTML/CSS/PHP/JavaScript) then all these changes will be lost. To make any WordPress theme you should use WordPress Child Theme to make any changes to an actual theme functionality via code. Here is more information on that: http://codex.wordpress.org/Child_Themes