Guest PC has been updated to version 1.9.6. Among the changes:

Bug Fixes
* Occasional crashes on Guest PC exit
* Drag-and-Drop malfunction after switching from the fullscreen mode

Enhancements
* Better networking
* Improved video in native resolution modes
* Improved USB functionality
* Better stability and compatibility

If you are a previously registered own of Guest PC, you can obtain the 1.9.6 update here (lismoresystems.com)