It might work better if you use the "Unplugged" installer:
https://skyline.ms/wiki/home/software/Skyline/page.view?name=SkylineInstall_64_25-1&submit=false

With the "unplugged" installer, you download the .zip file, unzip it. Then, you can either run "setup.exe" to install Skyline on your computer. Alternatively, you can run "Skyline.exe" in a sub-folder of what you unzipped.

If your download keeps getting interrupted, you might have more success using this webdav URL in a program such as "WinSCP":
https://skyline.ms/_webdav/home/software/Skyline/%40files/installers/Skyline-64_25_1_0_142.zip
-- Nick