Magewell Pro Capture DVI 4K Video Capture Card

Hi,
I tried to install the driver for Magewell Pro Capture DVI 4K Video Capture Card, following their documentation included in download. The download was on their site, I downloaded it yesterday. For install kernel development kit I used: apt-get install linux-headers-uname -r (the path it is in their documentation) and everything was fine, but when I tried to install install.sh and mwcap-install with command: ./mwcap-install and ./install.sh I got a error:
ERROR: Failed to copy driver source into /home/convergenta/Downloads/pro capture/ProCaptureForLinux_4177/mwcap_build.
Do you have any idea how can I install the driver?
Thank you!!!