I also am having the same issue and can not update my software. I am getting the same exact error message. I have tried a WIFI connection and a hard line connection. Please advise next step.
I was able to load the latest version from the link in the other thread. But I still can not connect to get any updates.
Please email Sales at Ecutek and we will sort this out for you immediately. I unfortunately can't publish direct download links to the software on the forum :-/