Hi Travis and thanks for your support.
If it's of any help, I have two computers at home, both were upgraded to Win10.
The FS computer has not been able to run the DU since the upgrade. This computer runs several other add-ons without a glitch.
The secondary computer (which has never seen FS installed) is running the DU perfectly fine until now (as well as other add-ons)
Both have of course the .NET 3.5.1 installed and are Windows-patched to the same level (same Windows Updates applied).
Regards