If that returns a 404, your only option is a Telerik Support Ticket (free users can still submit ticket for broken download links).
If you previously had a Telerik account and downloaded the product, you may still be able to access your past downloads: Account Downloads Page : Log into the Telerik Account Downloads telerik justdecompile offline installer link
One of its most powerful features is the ability to export a decompiled assembly as a full Visual Studio project ( .csproj ). Safety Warning Regarding Third-Party Links If that returns a 404, your only option
While caution is advised, reputable mirrors like CNET Download or Download3K still host legacy MSI or EXE installers. If you need an offline installer for a specific version (e
If you need an offline installer for a specific version (e.g., 2020), your best bet is to ask on Telerik’s official forums or support if they’ll provide a legacy link. Sometimes support will give you a direct URL if you explain a valid use case (air-gapped network, corporate policy). They are surprisingly helpful when you don’t ask for a crack.
Historical open-source plugins are also archived in the same location. JustDecompile FAQ - Telerik.com