Dex Ex not displaying properly on my new tablet.

The problem isn't actually anything to do with the resolution of the display, but rather Windows 10 High DPI scaling.   On Windows 10, a workaround exists that gives usable (but not ideal) results:

• Right-click Dexterit-E Explorer shortcut to display context menu
• Select the properties option
• Select the ‘Compatibility’ tab in the properties dialog
• Click the ‘Change high DPI settings’ button
• Check the ‘Override high DPI scaling behaviour’ checkbox
• Select ‘System (Enhanced) from the ‘Scaling performed by:’ drop down
• Click ‘OK’
• Click ‘Apply’

With this work around we have seen positive results on the Surface.  A permanent automatic solution will be available in the future.