Norbert — good news: this still works in the version you have. It's on a different screen from the one you were looking at.
The Selection menu you found with Copy/Move is inside a single track, and it acts on the points within that track. Bulk export lives on the stream list instead:
1. Open Streams from the home screen.
2. Long-press any entry. The list switches to selection mode.
3. Tap the three-dot menu, then Select, then Select All.
4. Tap the export icon in the toolbar (or three-dot menu, Export).
5. Pick MFT 1.0 and save.
I just ran this on 4.5.30 from the Play Store: 100 elements, written to a single 588MB .mft in seven seconds. That's the behaviour you remembered from July 2024, still there.
On the settings not transferring: that's expected, and it isn't specific to the adb route. Settings aren't stored in gpse.db, and an MFT export doesn't contain them either — MFT carries streams, waypoints, messages and attached pictures, but not preferences. Settings ride on Android's own backup instead: the app opts into having its preferences backed up with your Google account, so if you have Google backup switched on they should come back when you reinstall.
Your adb procedure is still a reasonable fallback and worth keeping.
Point taken that this is far too well hidden. Long-press isn't something anyone should have to guess at, and I'll look at surfacing it properly.
Michael