This topic is over 30 days old, so I'm assuming all is good, but I'm still curious. Was this resolved?
By default, Linux and Mac work with demos from two locations. They READ demo files (ie. play demos) from the q3ut4/demos sub-directory in the installation directory and READ/WRITE to the .q3ut4/demos directory in the user's home folder. This is to avoid write permissions issues for the user in question to the installation directory (just in case it's installed in a central place that only root/admin can modify).
It's a common security measure in Unix-like systems that's been around since the beginning of time. Windows, on the other hand, is a little less considerate of security needs. In Windows, the demos are written straight to the q3ut4/demos directory in the installation directory. So, say for example that you have this installed in C:\Program iles\UrbanTerror, you *may* run into issues writing demo files to that location if you are not logged in as an admin.
Personally, whenever I run from a Windows environment, I put the UrbanTerror directory somewhere like My Documents, just as Flame suggested, which is a directory you will have full write access to.
- Pickins