Hi Sandro,
I just had a look at our demo and I can see what you’re talking about. It’s not that you can’t unselect a checkbox, it’s that at least one checkbox has to be selected. So, using our demo as an example, let’s say you have only “Chess” selected, if you try and uncheck it and then click “Edit Profile”, it will indeed still be checked when the page reloads. If, instead, however, you uncheck “Chess” and then check another box, “Water Skiing” for example, and then click “Edit Profile”, you’ll see that, when the page reloads, “Chess” is indeed unchecked and only “Water Skiing” is checked.
It’s also worth noting that, if a user doesn’t select any box on registration, then no box will be selected on the edit profile screen. This only happens if a box was checked on registration or then later checked on the edit profile page.
We’ll take a look at this to see if we can make it so that, even after you’ve checked a box and saved, you can go back to having no boxes checked at all.
In the meantime, a simple alternative would be to add another box that says something like “None” or “Other” or whatever makes the most sense for your case.