I am running WXtoImg with Windows10 and, thanks to Kevin Schuchmann, I have the full version up and running. Make sure that you use the exact username and Key. I suggest you cut and paste each, use the info after the : for each. The info Kevin supplied is
Username :Kevin Schuchmann
WXtoimg KEY :CGHZ-PP9G-EAJZ-AWKK-NDNX
I hope this helps.