DDM Issues with U3415W on Windows 10 x64

I performed a Windows 8.1 upgrade to Windows 10 x64. I have been unable to use DDM to control my U3415W. Can anyone provide any clue as to what is not working? 

I have performed soft reboots on the monitor and PC as well as a hard reboot of the monitor, tried both on & off configurations of DDC/CI which did not seem to help, I executed the DDM application in both run-as administrator mode and normal operating mode and finally also tried running it in a Windows 7 compatibility mode with no improvement.

This is the only monitor attached to this PC. I am also including a DDM.txt file containing the diagnostic dump from the DDM application which shows the one monitor was detected. 

Monitor is detected by the OS correctly and appears to have the correct driver loaded.

DDM.TXT

========

Diagnostic Report, generated 8/28/2015 (6.1.7600)
Copyright (c) 1995-2015, EnTech Taiwan.
Version = 1.24.0.1586
OS = 6.1.7600.2 x64
Mechanism = 7
////////////////////////////////////////
ScreenNotifications = 0x00000000
AutoPreset.DELA0A6.68MCF52C0J4L = 0x00000000
CustomGrid.DELA0A6.68MCF52C0J4L = 0x00000000
GridType.DELA0A6.68MCF52C0J4L = 0x00000000
AppScanEx.DELA0A6.68MCF52C0J4L = 0x00000001
AppScan.DELA0A6.68MCF52C0J4L = 0x00000001
LastCheck = 0x0000A504
HintShown = 0x00000001
= 0x00000000
////////////////////////////////////////
08:35:54.521...LanguageID = 00000409 00000409 00000409
08:35:54.528...WinHandles = 0001010E 000100B8 00010112
08:35:54.534...Starting enumeration
08:35:54.606...Ending enumeration
08:35:54.607...New=DELA0A6000000030000
08:36:11.463...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
08:36:11.463...Dump: complete Windows device enumeration
08:36:11.463...1.DeviceName = \\.\DISPLAY1
08:36:11.463.....DeviceFlags = 00000005
08:36:11.463.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.463.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.463.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{8640F92B-A7DD-42BF-9EB9-AB24AA249AD2}\0000
08:36:11.464.....a.MonitorName = \\.\DISPLAY1\Monitor0
08:36:11.464.......MonitorFlags = 00000003
08:36:11.464.......MonitorString = Dell U3415W(DisplayPort)
08:36:11.464.......MonitorID = MONITOR\DELA0A6\{4d36e96e-e325-11ce-bfc1-08002be10318}\0000
08:36:11.464.......MonitorKey = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0000
08:36:11.465...2.DeviceName = \\.\DISPLAY2
08:36:11.465.....DeviceFlags = 00000000
08:36:11.465.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.465.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.466.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{8640F92B-A7DD-42BF-9EB9-AB24AA249AD2}\0001
08:36:11.466...3.DeviceName = \\.\DISPLAY3
08:36:11.466.....DeviceFlags = 00000000
08:36:11.466.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.466.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.466.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{8640F92B-A7DD-42BF-9EB9-AB24AA249AD2}\0002
08:36:11.467...4.DeviceName = \\.\DISPLAY4
08:36:11.467.....DeviceFlags = 00000000
08:36:11.467.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.467.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.467.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{8640F92B-A7DD-42BF-9EB9-AB24AA249AD2}\0003
08:36:11.468...5.DeviceName = \\.\DISPLAY5
08:36:11.468.....DeviceFlags = 00000000
08:36:11.468.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.468.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.468.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{6D2C083E-A06C-4A9E-AB5D-DBF2B47489B3}\0000
08:36:11.469...6.DeviceName = \\.\DISPLAY6
08:36:11.469.....DeviceFlags = 00000000
08:36:11.469.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.469.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.469.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{6D2C083E-A06C-4A9E-AB5D-DBF2B47489B3}\0001
08:36:11.469...7.DeviceName = \\.\DISPLAY7
08:36:11.470.....DeviceFlags = 00000000
08:36:11.470.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.470.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.470.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{6D2C083E-A06C-4A9E-AB5D-DBF2B47489B3}\0002
08:36:11.470...8.DeviceName = \\.\DISPLAY8
08:36:11.470.....DeviceFlags = 00000000
08:36:11.470.....DeviceString = NVIDIA GeForce GTX 980 Ti
08:36:11.471.....DeviceID = PCI\VEN_10DE&DEV_17C8&SUBSYS_49953842&REV_A1
08:36:11.471.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{6D2C083E-A06C-4A9E-AB5D-DBF2B47489B3}\0003
08:36:11.471...Total number of monitors enumerated = 1
08:36:11.471...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\