I think there is some confussion what the exact download location of the latest hotpot module is and if it is working with the latest release of moodle. You have two options: to edit hotpot entries in the moodle database, so it does not close them for students, or try downloading a different module from some other locations provided in this forum. That way you will eventually get a version that works with your version of moodle. The newer version, though, will have a file upload problem that was not corrected yet. But the solution is also provided in this forum. The newer version for some reasons does not record crossword scores. But then I am not sure where the most recent version of this module is available for download.
Well, Bruce, I am not an expert but I think you should edit the properties of the resource (I cannot be very accurate in the terms I use because my menus are in a different language, sorry...), and watch the dates of start and end of rhe quiz.
Several times I forgot to set a date for closing the quiz, so it gets the same dates for start and end - usually the time and date of the creation of the new resource. I think you must activate the editing mode, and then click the little hand icon in front of the quiz you need to edit; that will take you to a window where you can change the start and end dates.