An upgrade will try to install a newer version of antix control centre which includes a new deb ds-mouse-antix and removes mouse-cc-antix.
It complains of the desktop file not being removed, but the install gives errors.
Fix for now.
If you have done the upgrade;
dpkg --force-overwrite --purge mouse-cc-antix antix-cc-full-antix (or antix-cc-base-antix if using base version of antiX)
apt-get install antix-cc-full-antix
If you have not done the upgrade, before doing so
apt-get purge mouse-cc-antix
A fixed deb will appear later. (I'm out all day and evening today)