Because it runs aria2 directly from command line. Mine tool runs aria2 when starting the server and then aria listens for download requests.
Doggie took a break, apparently missed new build and changes in miniserver. Will adapt the miniserver scipt soon.
@antonio8909 I was a bit concerned about that at first, but you don't necessarily have to use "Download using aria2" at top of page, just right click files and "Download with IDM" or similar if you use a download manager, or just "Save As" and save the batch rename script from bottom of page, run it where you saved files to and all is good. This is particularly useful if you want a couple of editions but don't want to download all the common files each time (download bandwidth not being the problem).
As @Nucleus mentioned, i won't dare to touch the downloader CMD atm . Was referring to the miniserver that got updated by @mkuba50 lately.
Quick question: Downloading "Windows 10 Insider Preview 16299.0 (rs3_release)" via uup will update at a later date to the release version on october 17?