The offline installer for the paid version includes additional signing tools and the ability to decompile obfuscated assemblies (using plugin hooks).
Better handling of the latest .NET versions and C# features. telerik justdecompile offline installer updated
However, Telerik offers a if you need:
Telerik JustDecompile continues to be a high-performance, free tool for .NET developers needing to recover lost source code or examine external assemblies. The offline installer The offline installer for the paid version includes