cdock doesn't function in Mavericks
Hmmm I didn't relize 1.0.4 worked on Mavericks. You could use that if it was working for you before. Not sure what even changed post 1.0.4 that broke it. I'm just not actively testing/supporting 10.9 anymore.
can't apply changes in Dock
cDock and Mac High Sierra
Should be fixed.
Anything below version 1 will work on Mavericks.
Install an old version and turn off automatic updates. https://github.com/w0lfschild/app_updates/tree/master/cDock The amount of users on 10.10 in the latest version of cDock is 3%. I would imagine if it supported 10.9 the percentage would be about 1% or less. It's not worth the extra time to support when there's already a working version that will never break because 10.9 will never receive any more updates from Apple.
Install an old version and turn off automatic updates. https://github.com/w0lfschild/app_updates/tree/master/cDock