Enupal Snapshot plugin on local windows environment - can't save path Craft 3.3.20.1, Enupal Snapshot 1.2.7

Works on dev/live server but local can't find path to bins. 

Downloaded MXE (MinGW-w64) from https://wkhtmltopdf.org/downloads.html and put in local working directory. 

Tried D:\project\enupal-snapshot\wkhtmltox\bin\wkhtmltopdf.exe, without .exe and with slashes going the other way to be more unix-y.

Do I need to do something with the installer? Is the archive enough?
Have emailed Enupal support based on comment suggestion.