BigTalker: changing "speech device mode" after initial configuration?

I’ve been using big talker via VLC on my laptop for some time. In the initial configuration I set the speech device mode to “muciplayer”.
I’d like to use now several old android phones with Lannouncer instead of my laptop.
I couldn’t get it to work initially and found that the Speech Device Mode needs to be set to “speechsynthesis” instead of “musicplayer”. Is there a way to change this setting after the initial installation and configuration?

If I remove and re-install BigTalker and change the configuration during the fresh install, I’ll lose all the rules I’ve already programmed, correct?