Seems something with your Installation went wrong and the uninstaller was not generated. Try installing again first and then check if the uninstaller is available. You should also be able to uninstall it in the Software Window in your system settings.
1. I just tried installing it and i was getting a few errors which i had to ignore (retry did not work). The files i had to ignore include:
\lang\englishpatch201.big
\lang\englishpatch201_orig.big.bak
\lang\englishpatch201_norm.big.bak
\lang\englishpatch201_en.big.bak
\lang\English.big.bak
\lang\German.big
\lang\English_orig.big.bak
\lang\German_orig.big.bak
\lang\English_norm.big.bak
\lang\German_norm.big.bak
I tried uninstalling again from the launcher and i had the same problem.
2. I also checked in Control Panel > Uninstall Programs for Edain and it did not exist.