My new download is not over-writing a previous version of the software

When you download, you must take careful note of where you are saving that file (called an "installer").

Go to that location, find the most current Exam4 installer, then double-click to install Exam4 to its proper locations and run the software.

It may help to create a special folder for the current Exam4 download and keep it in a convenient location so you can be sure to find it.

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