I am unable to install the game...towards the end of the installation process the installer throws this message;

There was a problem opening the file /home/hannes/Games/gog_s…gdom_simulator_2.0.0.2.sh.

The file you opened has some invalid characters. If you continue editing this file you could corrupt this document.
You can also choose another character encoding and try again.

I can pick three options:

auto detect
current locale (UTf-8)
Western (ISO-8859-15)

none of them work.

Did anyone here solve that problem?