Where are my "download" and "navigator" folders gone ?

Hello.
I have a phone with android 10 (so no access restrictions on the Android>data folder) with 128 MB of internal memory and NO SD-card (not possible to install one there is no slot)
MFN is installed since years and works fine (actual version is 7.3.21)
Today in the settings of MFN I wanted to go into the map management (?) settings (my MFN install is french, it's called "Gestion des cartes", it's just before the orientation settings)
Immediatly I saw a window showing that the maps are copied elsewhere (where, I don't now), even if I didn't ask for that.
The problem is just I cannot find them anymore in the phone's memory.
Previously they went in Android>data>com.mapfactor.navigator>files>navigator>data
In fact in in Android>data>com.mapfactor.navigator>files the folders "download" and "navigator" are now missing, there is just the folder "temp" remaining.

But MFN is still working as before...
Doing a search in a file manager didn't help me to find where the MFN files are gone.

Some help or ideas would be appreciated !

Roland