Be aware that the update in Download Center applies to Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions such as Microsoft Office 365 Home. (How to determine?)
Improvements and fixes
Fixes the following issues:
When you use Microsoft OneDrive for Business to synchronize files, the synchronization may be stalled.
You can edit a checked out IRM document in Word 2013 unexpectedly.
When you try to use an Office 2013 application to open a file in SharePoint Server 2013 and the size of the central table database in the Office file cache is larger than 2 gigabytes (GB), the Office 2013 application crashes and then restarts. This update will compact the database so that its size won't grow to 2GB.
When you try to use Office 2013 applications to open a file in SharePoint Server 2013, it's unable to locate the subcache that's deleted or missing, and the Office 2013 application crashes.
Microsoft scanned this file for viruses by using the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it.
You may have to restart the computer after you install this update.
The global version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.