How to rule out errors? Any log possibility?

[BestRadarDetectors]

If you are using GPS with speed limit settings it will not go into defense mode until after you exceed your speed settings.

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[Licht77]

If you are using GPS with speed limit settings it will not go into defense mode until after you exceed your speed settings.

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Thanks for the info - yes, I am aware of that!

So far I tend to think that its the last 2 or 3 firmware updates that broke my ALP here. To rule that out I would like to revert to a lower firmware - is that possible without problems?
If the problem still exists with - lets say 5.2.1 then its not a software problem... if its fixed then I got a smoking gun...

So - same procedure as with an upgrade, resetting afterwards and ideally using an old config file... right?