[GNC] Entry Point Not Found error

[Kari E]

64 bit Windows 10 Home, I have been running ancient version of Gnucash, and
I updated to latest version, and when I attempt to run the app or double
click on the gnucash book, I get:

"The procedure entry point inflateValidate could not be located in the
dynamic link library D:\program Files\gnucash\bin\libpng16-16.dll"

Search brings me an unhelpful post from 5 years ago (
https://lists.gnucash.org/pipermail/gnucash-user/2018-June/077629.html )
but nothing else.  How do I get gnucash running again?

Kari Elliott