You may experience a crash of VMRCplus when browsing folders on x64. For example when selecting a folder for a virtual hard disk or virtual machine.
This is caused by a bug in the FolderBrowserDialog of the .Net Framework. This has been fixed but a public fix is not available. It will be available through a service pack, probably by the end of 2007.
The issue may not occur on all x64 systems. It seems to depend on the speed and time of browsing. If it does, you should Continue the application. For now your only option is to type the full path and not use the folder browser.