As long as you did not change anything in the parent theme, you should be OK. However, as I tell everyone, it’s always best to play it safe, even when updating a plugin, or WordPress, is to have a backup plugin that backs up your site and database 🙂
As usual thank you so much for your incredibly fast reply..on a Sunday!
I was talking about the customize stuffs – I know if I re-install from backend/themes I will lose all colors and padding and all that I set in customize – NOT set up in the child theme – I wish it would but it is difficult to check all css classes and install in css child. Not sure of all classes or ID of what is in the customize backend – that’s what I was talking about – that with a bit of luck I would not lose those customized stuffs if I update through FTP?
As I mentioned… if you did not touch any theme files from the parent theme, and you are using a child theme, then yes, you can update the parent theme without losing your child theme modifications. But as I said also, make sure you use a backup plugin to make backups for those unexpected events 🙂
Updating the theme is done by FTP because if you did it from the admin side, then you would potentially lose stuff.