It will be possible to continue your games from 0.1.0, but I do not recommend it. Some of the newly made habitable provinces will not display trade goods and pops correctly. Should not cause a crash or anything radical, but it is not recommended. If you want to continue the ongoing games from 0.1.0 Alpha, go on the paradox forums and download the old version from there. Link: https://forum.paradoxplaza.com/forum/threads/mod-de-atlas-orbis-terrarum-a-map-overhaul.1461487/