Selective Tool error message - what??  

In the last couple of week, I've been getting an error message that says essentially "Selective Tool is not working" when I click to select something - whether in Windows Explorer, in Photoshop, in LIghtroom, etc. Seems to be application agnostic.
The mouse pointer freezes - and I have to use Task Manager to shut down the offending party.

Today, it happened again in Lightroom. I went into System Information and found this entry in the Error Log:
4/1/2021 10:12 PM Application Hang The program SelectiveToolApp.exe version 5.0.3.101 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Security and Maintenance control panel.
 Process ID: 3110
 Start Time: 01d72739f4efb06d
 Termination Time: 4
 Application Path: C:\ProgramData\DxO\Selective Palette\resource\qtlibs\SelectiveToolApp.exe
 Report Id: 08dc1995-146a-4ed2-a14d-592652e57d3d
 Faulting package full name: 
 Faulting package-relative application ID: 
 Hang type: Unknown


NO clue what it means, but it may help.
I've been using this mouse on this computer for 15 months without any problem.
Dell recommended updates have been applied.

Running Windows 10 Pro version 20H2 Build 19042.867
64GB RAM, Nvidia GeForce RTX 2070 super
The mouse is AW310M -
Box is Alienware Aurora R9

Any help or direction to recommended fix will be appreciated