I’m not sure I understand what you’re looking for. You can re-use maps – just enter the map id in the mappress shortcode.
With that said, the mapid can be hard to find since they’re only visible in the post where they were created. If you’re looking for a comprehensive “overview” list of maps, that’s coming but it’s not ready yet – I’m shooting for the beta after the next one (2.38.3) to convert them to custom post types.
Anyway, if you like please post some more details or send me an email.