If you could also indicate what version of Mudlet and the OS platform that you are using that would also help us coders try to reproduce what you might be experiencing - each version of Mudlet introduces features (and possibly bugs) that may not be the same as other versions!
At the time of writing most of you are on Release 2.1 or a "Preview" version of 3.0.0, which currently is "delta" or for the adventurous, who want to be on the
bleeding edge (there may be blood!) you might be using something even newer from our
Git repositories {"release_30" is the tip from which the aforesaid "Previews" are previous steps and "development" is
not quite from whence it came, and will
hopefully head in the same direction, though
not yet.}
Eventually (and the latest version do) Mudlet should respond to the GNU standard CLI invocation of "mudlet -v" or "mudlet --version" to say which version it is but for those of you with mainly a Graphical User Interface (Windows/MacOs) you can also get this info from the "About Mudlet" dialog that clicking the "About" button on the main toolbar brings up if you don't catch the splash screen as it flashes in front of your eyes.