Why uninstall:
If you plan on removing language DLL(s) manually:
While you can install both the Taskbar and the X(e)Center Widget at the same time, DO NOT attempt to run the Taskbar and the X(e)Center Widget at the same time. Simply having X(e)Center open with the Widget installed will prevent the Taskbar from running if X(e)Center is open.
The DOS TSR is only useful for full screen DOS sessions. The installer doesn't add it to AUTOEXEC.BAT.
See the documentation for more details.