In case you are running into this error while trying to uninstall KDS on Windows (I had it with KDS V1.1.0, but it might apply to other versions too):
"Error opening installation log file. Verify that the specified log file location exists and is writeable."
After some googling, some installers (or uninstallers) can cause that error message. It seems that some files/folders are not accessible.
In my case I had it with installing KDS, and then wanted to uninstall it as I installed (in error) V1.1.0 (and not the latest V1.1.1).
I had not rebooted afterwards. But when I rebooted, the problem does go away.
So if you run into that problem: reboot your machine and try again. It worked for me.
Happy Uninstalling :-)
