Telerik JustDecompile has been officially by Progress Telerik as of April 2024. While the official product is no longer supported or available for new downloads from the Telerik site, it remains a favorite for its high-speed decompilation and the ability to recover lost source code. Offline Installer Guide for JustDecompile
If permissible by security policy, set up a whitelisted machine that can access Telerik’s update server. Write a PowerShell script that: telerik justdecompile offline installer upd
If you have a free Telerik account (recommended): telerik justdecompile offline installer upd