There are instances where Company Logo is not showing up after restoring database. There are different reason why this happens. One reason is that dropbox has not been setup properly, or the location if the logo image has been change.
To fix this problem, simply go to Home > Menu > App Settings > Company Logo, and upload again your company logo.
Follow this guide to add company logo: http://help.imsunny.com/add-company-logo/
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