What's wrong with the plugin? I don't use FuBar, and hence don't use the plugin, but as FuBar hasn't changed at all in a year or more, I really don't see how it could be broken. I also don't monitor these forums for posts about my addons when they have easily usable comment functions on their download pages. If you're actually having a problem that isn't caused by your failure to "enable out of date addons" at the addon screen, feel free to post a bug report on the download page.
Edit: Also, if all you want is the cooldown timer, just use FuBar_AnkhTimerFu. Someone else wrote it, and it's just a cooldown timer plugin for FuBar, without any of the other features of ACT.