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title: About box
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The _about box_ displays the software version and the information about the tools used in background.

The status of each tool is indicated:
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: The tool is well detected.
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: The tool cannot be found but it's not necessary. Expect some features not to work properly even if the software is still usable.
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: The tool cannot be found but it's necessary. The software is not usable. This happens when the tool cannot be located using the PATH variable.
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