Execute the MSI and follow the on-screen prompts. No internet activation or "license key" was required for the free standalone JustDecompile tool JustDecompile FAQ - Telerik.com
The standalone installer (MSI or ZIP) provided several high-speed decompilation features for .NET developers: Create Projects with JustDecompile - Telerik.com telerik justdecompile offline installer best
The offline installer bundles all necessary dependencies. When you run it, you are immune to: Execute the MSI and follow the on-screen prompts
Contrary to popular belief, Telerik does not bury the offline installer. Here is the way to get it: telerik justdecompile offline installer best