how to update instyle theme

how to update instyle 1,2 --> 1,3 and how to save the change in instyle template options (i try to press the botton SAVE but when go to another page the settings lost)

There's a problem with template options after WP 4.0 update, after the update this problem will be fixed. Please check this article about updates:
https://www.gavick.com/documentation/wo ... -gk-theme/

Did you add any changes into your theme files? All css changes should be added into css/override.css file and you can simply backup this file, update the theme, then restore this override file.

thanksssss