Solid Works crashes during making flat pattern

Hello Everybody,

For few months I have a problem with Solid Works 2013 x 64 Edition.

I follow procedure in accordance to files in attachment (1,2,3).

The crash often occur with simply sheet metal bend parts (angle bars, parts similiar to that in attachment etc).

I hope you will help me with finding solution. In attachment you can find also Solid Works performance log.

Thank you in advance.

My Computer:

Windows 7 Professional

Intel(R) Core(TM)2 Quad CPU Q9400 2,66GHz

NVIDIA QUADRO 4000

RAM 8 GB

SolidworksSheet Metal