Can I set it up to update only some files ?

[dolcedev]

Great library! I have the doubt if my plugin needs to be updated enterely or there is a way to update some files (like css and js scripts). Thank you!

[YahnisElsts]

Currently, that is not possible. The update checker doesn't have any support for partial updates.

Also, this update checker doesn't actually install updates - it lets WordPress core do that. As far as I know, WordPress core doesn't support partial updates for plugins or themes.