The wrapper does not require a username/password to be entered. I don't have password protected shares and Kodi+wrapper works without from a clean install without ever having run the wrapper app.
I noticed something strange last night which I think might have been caused by the change to the shares.
I have a 6tb internal hd in the Q10 and I also have Synology Nas's connected via Ethernet.
The Nas's are plugged into the same switch that the Q10 is plugged into so no major network redirection.
Anyway. When re-adding movies & tv shows in kodi, when selecting browse (under videos->files->add source) I found that 50-60% of the time kodi would report errors trying to connect to anything. I never had this issue before. It is as if kodi is being refused connection to any device.