Looks like link for downloading may be having trouble:
https://www.convert-in.com/releases/20180507/pdfekit.exe results (when clicked) in:
This site can’t be reached
http://www.convert-in.com unexpectedly closed the connection.
Checking the connection
Checking the proxy and the firewall
Running Windows Network Diagnostics
When using Google Chrome and Firefox – but Microsoft Edge works fine, go figure, LOL!