Upgrade to version 8 and application is now unresponsive

I upgraded to the latest version. after doing so, I updated a previous project file from version 7.2, saved and now when i try to alter diagrams the system becomes unresponsive, and seems very error prone.

any assistance or discussion with others having this problem would be greatly appreciated.

This problem should be fixed and please upgrade to latest patch build to apply the fix. Details about update to latest patch build can be found at

Feel free to contact me if you need any help.

Best regards,