As to Tyler's earlier additional suggestion, the NVDA issue on GitHub that he originated on MathPlayer dates from approximately one year ago is: COM Registration Fixing tool doesn't work
I remain unclear as to exactly what did end up working after having read through the topic.
Brian - Windows 10 Pro, 64-Bit, Version 1909, Build 18363
Most of the change we think we see in life is due to truths being in and out of favor.
~ Robert Frost, The Black Cottage (1914)