DoliMed won't update patients

Hello,

Yesterday I’ve bought DoliMed, and today I tried to get the hang of it.
Most of the things work, it’s just a pitty that there are a lot of ‘language’ issues.
For a product that’s not free, you expect a bit more of the details, and some premium support…

For the moment, I’ve just have one big issue: An existing patient can’t be updated?
When I try to edit it, I’m getting an error that the field “name of customer” must be filled in. Since it’s an existing person, seems a bit a strange error to me.
When I now change the name (equals creating a new user?), I’m getting an error that the field ‘Familyname and name’ are mandatory?

Any help is much appreciated!!!

For the time being, I’ve put following lines in comment: