Yesterday, I had the same problem, so I did a lot of digging around to figure it out. There is a right click menu available when you find your selected redistributable package (checked in the list). Right click on the .NET selection then go to Properties. You will have 3 choices presented in the drop down box as the source of the installation - Source file, Web or Setup.exe. You will need to select Setup.exe. It seems to look to the web as default. Hope that helps. I don't know everything that you're trying to do so if this is way off, forgive me.
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