Absolutely! Note that Adobe Extension Manager will only install an extension to the CS/CC apps of the same version (CS5, CS6, etc.). So, you'll need to perform the installation process for each CS version that you have. You should install the same TimeTracker extension (timetracker.zxp) to each of these.
Presume you have CS6 and Creative Cloud installed. You will need to install the TimeTracker extension in Extension Manager CS6 and Extension Manager CC. Simply open each Extension Manager, click "Install", select the timetracker.zxp, and click "Open".