1. First, try navigating to settings > Advanced > Backup and restore.
iChrome makes regular backups to your settings, so a recent one may be in there. It that's the case, you can easily click restore from one of the recent entries .
2. Alternatively, have you double checked that you are logged in to your account? Often users get logged out and it appears that the settings have been lost. Navigating to Settings > Account will show you if you are logged in or not.
If you haven't already made an account, we recommend making one as this will store your settings better and make them more easy to maintain for us.
Hope this helps!