Let's try this...
The following tool will purge the application (your layouts will be preserved).
**IMPORTANT** Please save any open documents/work and close out all of your applications including browsers. Your PC may restart after running this .bat file.
Please follow this link:
http://sd.stardock.com/zubaz/apps/Purge_Fences.bat
If you are running Windows 8/10, you may be notified that Windows is protecting your PC. Select "More info" and then "Run anyway".
Reboot the computer and reinstall the application. Note: It is important to get the most recent version of the application.
For getting your product, key and activation instructions, please see the following:
https://esupport.stardock.com/index.php?/Knowledgebase/Article/View/104/101/how-can-i-get-my-registration-information-again
Please DO NOT change any of the default settings until you verify that the application is running as expected in its default state.
If Fences is functioning as it should be, please try restoring a previous snapshot to see if that helps the situation any.
To restore Fences to a previous snapshot:
-Right click on the desktop and select "Configure Fences..."
-Click on "Layout and snapping" on the left hand side of the configuration window that appears.
-Select a snapshot you wish to revert to. A preview window will appear showing you what the desktop will look like.
-Click Restore Snapshot to revert the desktop to this preview.
Let us know please...