Hi,
We are glad you loved our product SQLyog.
Regarding the crash:
1. Can you please reboot the OS?
It could be an issue with Windows 7 'Data Execution Prevention (DEP)' feature that is not quite stable. A reboot will normally solve this. Please reboot and let us know the status.
2.You can make an exception in 'Data Execution Prevention (DEP)' settings for the SQLyog.
3.If still the issue still persists, please attach the dump, so that we can try at our end.
Thanks & Regards,
Khushboo