There may be an issue with this release relating to changing the language in Fences itself. If you change it there, the Fences configuration will not open again.
Current fix, uninstall Fences (selecting the option to remove settings) and then reinstall. Do not select the language in app again.
If you are familiar with the Windows Registry, I fix can also be done from there. Delete the key "UserLang" from HKEY_CURRENT_USER\SOFTWARE\Stardock\Fences
Also, you can run this file (as administrator) to accomplish the above method. https://cdn.stardock.us/support/uploads/RemoveUserlang.zip
It appears that it will function correctly when setting the language via Windows
Associate Technical Support Analyst