Westwood Online not installed?

I get the error "Westwood online is not installed on this computer" when I try to use it.
I tried the GoG installer first, but then it seemed like the patch I saw on Reddit's /r/Nox would be easier via the community download of Nox. I used that. Then I downloaded the patch and moved all the files over to the main folder. Any ideas what to do?
I used this for Nox itself
archive.noxcommunity.com/NoxInstall.zip
and I used this for the SDL patch. (What is SDL btw?)
http://www.noxforum.net/index.php?topic=8677.0
(The first link he listed, http://www.noxforum.net/index.php?topic ... 5#msg90185
which brings you, finally, to http://server1.awesie.org/NoxGUI_beta11.zip)
Ideas?
I tried the GoG installer first, but then it seemed like the patch I saw on Reddit's /r/Nox would be easier via the community download of Nox. I used that. Then I downloaded the patch and moved all the files over to the main folder. Any ideas what to do?
I used this for Nox itself
archive.noxcommunity.com/NoxInstall.zip
and I used this for the SDL patch. (What is SDL btw?)
http://www.noxforum.net/index.php?topic=8677.0
(The first link he listed, http://www.noxforum.net/index.php?topic ... 5#msg90185
which brings you, finally, to http://server1.awesie.org/NoxGUI_beta11.zip)
Ideas?