@rodri hi... it seems you‘ve missed our announcements and the fact that you can‘t upgrade from anything before version 6.0 (which is the current latest release). So you‘ll have to do a clean instsllation.
I thought something like that might have been the issue. Thanks!
Well, I've now a general procedure to get Recalbox running on a Pimoroni Picade.
Because I think this could be a valueable information, I decided to finish this thread and to open a new and fresh one. So nobody has to read through all the posts in this thread to come to the solution.
There is still one option staying, to replace the dosbox version in the packages with an older one, working pretty well for me and that I use currently. As /usr/bin/dosbox Older Dosbox version
I solved used Sixasis Pairing tool from Windows, i forced my "problematic" Shanwan to connect to Raspberry BT address.
Now i have the problem that all 2 shanwan copies are detected as "Playstation 3 original" , but i selected Shanwan drivers from configuration and i read that supports "original and shanwan" , so at the moment i cannot see any issue with this.
Recalbox is free and support is not expected to be given quickly, i just ask if somebody can shed light about where BT pairing informations are stored, why Shanwan copies are detected as Ps3 original and so on.
In the FAQ, in the tutorial we can add Sixasis Pairing tool way for problematic controller, i can give my availability to improve the community experience.
I also had other issues with Ps3 ORIGINAL pad (that now i use only with Android phone), this device often pressed buttons, never really pressed! Led often stay OFF, but pad was working (with ghost pressing issue).
I thought was a problem with pad, but with Android works like a charm, maybe if reoccurs with Shanwan units i should open another thread.