Debugging the IDE

Brahn Partridge points out that you can use SharpDevelop's ILSpy to step through the decompiled source of Clarion8. You can even set breakpoints. 

The SharpDevelop team began work on ILSpy after Red Gate announced that it would stop releasing thee free version of .NET Reflector after Feb 2011, and only paid versions would be available. 

You can also view the IDE's XLog files using Jeff Slarve's utility, available from the downloads page