Brian Scott made me a committer on the Cropper open source project, so I have committed a fix for Vista x64 and made an incremental release that contains this fix.
With Cropper 1.9.1, Cropper would run as a .Net Framework x64 application, but because some of the necessary libraries are Win32 libraries, the utility would crash when used on Vista x64.
The fix for this problem is to tell .Net that this needs to be a .Net Framework x86 application since it depends on Win32 APIs. For those who have never had to worry about this particular distinction, the setting is in project properties. Setting x86 explicitly instead of “any cpu” gives the .Net Framework more guidance when creating the AppDomain and loading assemblies.