After I installed Mailing list I wanted to uninstall it. I pushed the uninstall button and suddenly I can't get In the wordpress admin. Following message shows :
Table 'johanvpan6480be7155_mysqldd40b440151c85edcd4ced8bad66217a.wp_zing_customer' doesn't exist
Indeed, there is a problem in the mailz plugin. If you uninstall it, it will delete the web shop tables as well (they share the same prefix).
Better warn people. I just lost +/- 200 hours of work.