There have been tons of false positives on viruses lately, particularly trojans such as Wacatac or others. Most of the time, you'll see it end in "ml" in windows defender, which means that machine learning found it. Microsoft know about the problem now. Basically, the files are safe. Disable windows defender while you download and then you can turn it back on later. I heard it's an issue with how sites like MEGA share files now, anti virus software thinks its an outsider trying to send commands to your network, much like how a trojan works.
Don't worry about it developer.