Ok, so here is the logs when I start rockpoold from the command line : pastebin.com/p4brZPED .
If we take a look at the end, we can read that the new version is detected, but the internal status about available update is set to false. And with the calls from qdbus, I have the same results than before.
Maybe because my version number has an unexpected format rockpool can't define if my version is the latest or not ?

Edit : I did this with the 0.5-1 version