Project Assets doesn't drop down

I have

Adobe Premiere Elements 15

Version 15.0 (20160905.daily.1036636)

In Expert mode

If I click

Add media

Files and Folders - in the menu that drops down

Select 3 MP4s from a folder on my external hard drive

Adding media... - Is displayed briefly

If I click on Project Assets - Nothing drops down

There are also no clips in the timeline

I've tried deleting

"C:\Users\<*My PC User Name*>\AppData\Roaming\Adobe\Premiere Elements\15.0\Adobe Premiere Elements Prefs"

and when I open Adobe Premiere Elements 15 again and try to add three clips again,

the Project Assets drops down on the first project I create but then

fails and Project Assets doesn't drop down anymore if I create new projects or load existing

"C:\Users\<*My PC User Name*>\Documents\Adobe\Premiere Elements\15.0\<*My Premiere Elements Projects*>.prel" projects.

Windows information:

Windows logo key > (search for) system > Clicked on 'System Information'

Selected most lines and copy and pasted.  Here are most of the items listed:

OS Name Microsoft Windows 10 Home

Version 10.0.14393 Build 14393

Other OS Description Not Available

OS Manufacturer Microsoft Corporation

System Manufacturer Dell Inc.

System Model Inspiron 3558

System Type x64-based PC

System SKU 06B0

Processor Intel(R) Core(TM) i3-5015U CPU @ 2.10GHz, 2100 Mhz, 2 Core(s), 4 Logical Processor(s)

BIOS Version/Date Dell Inc. A11, 9/6/2016

SMBIOS Version 2.8

Embedded Controller Version 255.255

BIOS Mode UEFI

BaseBoard Manufacturer Dell Inc.

BaseBoard Model Not Available

BaseBoard Name Base Board

Platform Role Mobile

Secure Boot State On

PCR7 Configuration Binding Not Possible

Windows Directory C:\Windows

System Directory C:\Windows\system32

Boot Device \Device\HarddiskVolume1

Locale United States

Hardware Abstraction Layer Version = "10.0.14393.1378"

Time Zone Eastern Standard Time

Installed Physical Memory (RAM) 6.00 GB

Total Physical Memory 5.91 GB

Available Physical Memory 2.42 GB

Total Virtual Memory 8.31 GB

Available Virtual Memory 4.16 GB

Page File Space 2.40 GB

Page File C:\pagefile.sys

Hyper-V - VM Monitor Mode Extensions Yes

Hyper-V - Second Level Address Translation Extensions Yes

Hyper-V - Virtualization Enabled in Firmware Yes

Hyper-V - Data Execution Protection Yes

Any help would be appreciated.