The new Yola Mail refresh did not affect your inbox. Your email, calendar events, configurations, contacts, and everything else remain intact.
To find an email in your mailbox you have several options:
1. Go to your mailbox and click Search.
2. To find an email from an older date, choose Date and pick an option Older than a month from the drop-down menu:
3. To search for an email in all folders, choose Scope and pick All folders from the drop-down menu: