I re-installed medialab and this didn't help. The same thing happens.
I also installed a new copy of medialab on another PC with windows 8.1, MS Office 2010 and same thing happens.
Has the MediaLab team successfully ran the software on this operating system?
It works for Windows 7. It is also unfortunate that MediaLab doesn't log crash reports. It could as well be a hardware specific problem but one can never know.