In the 1.x we changed the table name of entities. If you have a running instance of the plugin you can run this SQL to rename the tables :
RENAME TABLE `mbiz_cms_page` TO `monsieurbiz_cms_page`;
RENAME TABLE `mbiz_cms_page_translation` TO `monsieurbiz_cms_page_translation`;
RENAME TABLE `mbiz_cms_page_channels` TO `monsieurbiz_cms_page_channels`;We upgraded also the Rich Editor to the 2.0 version.