How to update Remix theme?
1. Backup your theme folder and Remix plus plugin folder
2. Download new theme from themeforest
3. Delete your current Remix plus plugin
4. Upload new theme folder or install new theme from admin Dashboard > Themes
5. Go to Appearance > Install plugins and install new version of remix plus plugin
6. If you need to update WPBakery Page Builder or slider plugin, like step #5 delete it and install it again