Only the Home subscription owner can remove members from the subscription.
How to remove members from your Home Subscription:
Login to jottacloud.com and go to Settings from the main menu
Go to Family members
Press Edit to the right of the member's name
Confirm that you want to remove the person, in the pop-up dialog
When you remove a member from your Home subscription, all files in their user account will remain saved. The user will automatically be transitioned to a Personal subscription that expires in 10 days.
During this 10-day period, the user can choose to cancel the subscription or add payment details to continue with their own subscription beyond the trial period.