Downloading directly seems to work fine, it takes a while but doesn’t terminate without warning. I have one user who forwarded his error message. Also not mentioned is the fact we’re using Email Before Download, which is no longer officially supported as a way to mask the URL of the download, so that users must fill out a form before they get access. I have the log from a user who tried to download via wget, which I will include below.
shell
wduss@ceres [~/Desktop]
? wget https://cyberextruder.com/wp-content/plugins/email-before-download/download.php\?dl\=8da9c4174b1d4557e56fc314e5c3a401
--2017-09-27 13:33:43-- https://cyberextruder.com/wp-content/plugins/email-before-download/download.php?dl=8da9c4174b1d4557e56fc314e5c3a401
Resolving cyberextruder.com... 192.124.249.3
Connecting to cyberextruder.com|192.124.249.3|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1648971853 (1.5G) [application/zip]
Saving to: ‘download.php?dl=8da9c4174b1d4557e56fc314e5c3a401.1’
download.php?dl= 55%[====> ] 876.73M 2.02MB/s in 8m 43s
2017-09-27 13:42:28 (1.68 MB/s) - Connection closed at byte 919321757. Retrying.
--2017-09-27 13:42:29-- (try: 2) https://cyberextruder.com/wp-content/plugins/email-before-download/download.php?dl=8da9c4174b1d4557e56fc314e5c3a401
Connecting to cyberextruder.com|192.124.249.3|:443... connected.
HTTP request sent, awaiting response... 206 Partial Content
Retrying.
And yes, I did contact you a while back via private support but also posted here to see what other answers might present themselves.