Hello, it just happened the same to me, and when i aither try to change that false into true, or just copy the file from the post of Xordan, what it says is...
error whean creating c:\program files\planeshift steel blue\updaterinfo.xml. make sure the acces route and the file name are correct (or sth like that, i just translated it from spanish)
must tell you i checked where its going to be installed, and the path is correct