[SOLVED] How to change customergroup for customer?

I want to use another customergroup for a new customer (instead of the "Default"). Opencart ask me to confirm the change with the users password. But how can do this when I can't see the customers password (the first password is with stars/dots)? If I try save the settings I ofcourse get the errormessage: "Password and password confirmation do not match!"

Just clear out the first password, change the user group and then click "Save". It works, I just tried it.

Thank you