@ mikeroberts
This is the procedure that I went through and everything is OK.
I used # 3
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First install version - NAVIGON.v.5.5.0.b.108055001.apk
Start Navigation and download data approx. 650 MB
From the "computer" add maps to folder - Map
From the "computer" add poi to folder - Poi
File - Terrain_EU.nfs - copy to folder - Data
Run Navigon.
Uninstall the Navigon
Install version - NAVIGON_Europe_v5.5.0_FreshMaps_InApps.apk
Run Navigon.
Settings - Navigation - Map view – and choose Panorama View 3D
When the associated internet in navigation tap - Shop - and all packages should be selected.