I uninstalled the app using SDMaid and started afresh and now everything is working 100%. Not sure what went wrong, or if I installed the wrong version, but now menues all checked and setup to my liking with everything working.
Sorry for the false alarm and the authors efforts are much appreciated.
While I am 100% happy, at my advanced age, to use maps on the phone I am certainly tempted to but a NAV3 device to have a play.
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