Adobe Acrobat Pro DC has huge unresizable screen

You can see the difference.... why isn't Adobe sensing the screen resolution from Windows?

System Report:

Account Detail:
   User Rights: Admin
   User Account Control: Limited
   Process Integrity: Medium
   Profile Type: None
Acrobat Detail:
   Sandboxing: Off
   Captive Reader: No
   Multi-Reader on Desktop Support: Off
Applications Installed:
   Office Version: Office 2016 32-bit
Available Physical Memory: 3256324 KB
Available Virtual Memory: 3909396 KB
BIOS Version: DELL   - 1072009
Default Browser:
Default Mail: Microsoft Outlook
    mapi32.dll
    Version: 1.0.2536.0 (rs1_release.160715-1616)

Display Detail:
   Screen Width: 1920
   Screen Height: 1080
   Number of Monitors: 3
   Number of Mouse Buttons: 8
   Has Mouse Wheel: Yes
   Has Pen Windows: No
   Double Byte Character Set: No
   Has Input Method Editor: Yes
   Inside Screen Reader: No
Graphics Card: Intel(R) HD Graphics 5500
    Version: 20.19.15.4531
    Check: Not Supported
Installed Acrobat: C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\Acrobat.exe
    Version: 17.9.20044.222436
    Creation Date: 2017/04/04
    Creation Time: 5:38:20 PM
Installed Acrobat: C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe
    Version: 17.9.20044.222436
    Creation Date: 2017/04/04
    Creation Time: 5:38:18 PM
Locale: English (United States)
Monitor:
    Name: DisplayLink USB Device
    Resolution: 1920 x 1080 x 60
    Bits per pixel: 32
Monitor:
    Name: Intel(R) HD Graphics 5500
    Resolution: 1920 x 1080 x 60
    Bits per pixel: 32
OS Manufacturer: Microsoft Corporation
OS Name: Microsoft Windows 10
OS Version: 10.0.14393 
Page File Space: 4194303 KB
Processor: Intel64 Family 6 Model 61 Stepping 4  GenuineIntel  ~2195  Mhz
Session Detail:
   Boot Type: Normal
   Is Shutting Down: No
   Network: Available
   Inside Citrix: No
   Inside VMWare: No
   Remote Session: No
   Remote Control: No
   Using JAWS: No
   Using ZoomText: No
   Using Windows-Eyes: No
   Using NVDA: No
System Name: DO-FISCAL-DIR-L
Temporary Directory: C:\Users\MATTHE~1.DEA\AppData\Local\Temp\
Time Zone: Pacific Standard Time
Total Physical Memory: 4194303 KB
Total Virtual Memory: 4194176 KB
User Name: matthew.dean
Windows Detail:
   Tablet PC: Yes
   Starter Edition: No
   Media Center Edition: No
   Slow Machine: No
Windows Directory: C:\WINDOWS