Thanks c.s.g.,
I was looking at this. My idea was to download add-on source code, create own version that will allow me to check communication between add-on and Locus Map.
Unfortunately, the source of the app and the necessary tools around this project are so old (6+ years), that with current methods I'm simply not able to create own version.
The solution should be to convert it to a new build system and switch to the latest Locus Map API, but my estimate is 2+ days to make it all work. And sorry, I do not have it now for this task.
Do not know what exactly is. My test ends with the crash that no database is set, even it isn't true. Hard to say what is wrong, but unfortunately, I do not have a simple solution, sorry.