It is a Windows only, closed source product. There is mention of using "Wine" to run it on Linux. Too bad it wasn't open source, then we wouldn't be in the current mess.
You have to pay for this if you want to use it beyond the trial period. However, hold your horses! The author died and the license server no longer serves -- so If you paid you are up a creek without a paddle
Jet Brains "rider" is an IDE that you could use in lieu of Visual Studio from
Microsoft. It is supposed to include a good .NET disassembler that will
generate C# code from a DLL and perhaps an EXE.
It is free for non-commercial use!
Tom's Mineralogy Info / tom@mmto.org