I've already downloaded that though. There's no DDS converter there. You can convert from dds but not to dds.
And I've mentioned already in the OP, I am running XP. :facepalm: DDS Converter 2 just stopped working, and now it won't work no matter if I uninstall it and reinstall it again. It's definitely not working fine in Windows XP 32 bit, at least not on my machine.
Oops, sorry, I should have read the OP closer.
I had it installed on my laptop (32-bit) and never had problems. Hmm. Have you tried uninstalling with http://www.revouninstaller.com/revo_uninstaller_free_download.html (http://www.gamesas.com/index.php?showtopic=983941&st=0&p=14225246)? Could be a registry booger that DDS 2.1 left on your system that is messing things up. Select the most advanced uninstallation option on Revo, and remove all registry items and extra files from DDS converter - well, assuming it leaves things in the registry, I don't know for certain.