Transitioning from repo domain mapping to yours

I've been using the domain mapping plugin on a multisite for years, unfortunately, the version released this week broke a lot of things and I'm getting headaches downgrading to the earlier version.

I to find out about transitioning to your Domain Mapping plugin. If I install yours, will it use the existing mapping I already have setup for sites in the database, of am I going to have to go through manually and re-add all the mapped domains for each site? Will your plugin automatically use the mapped domains we already have setup using the repo plugin?