I need help with PyIlper on Windows 10

[twoweims]

I am primarily a Mac user and have little knowledge of the deep dark secrets of the modern versions of Windows.

I have PyIlper (1.8.5) installed via Anaconda on my Mac and a Windows 10 machine. Both have been working fine for quite some time.

Recently, PyIlper on Windows refuses to start up completely. Typing "pyilper" at the anaconda prompt produces a blank white window with "pyILPER 1.8.5" in the title block and then the blue spinny ring spins until I force quit PyIlper.

I have done a clean uninstall\reinstall of Anaconda and reinstall of PyIlper.
I have verified Pyhton 3.9 is installed.

Are there any places deep within the bowels of Windows that may need cleaning out when I uninstall Anaconda that the published uninstall procedure does not cover?

Thanks for any advice.

- Dan