Reminder pops up covering error message

From an email list, I did “Create a meeting from a message”, I get an error because no Calendar folder is assigned to that Yahoo account. As soon as error message pops up, reminder window also pops up covering the error message. I can’t go to the error message nor I can minimize Reminder Window. I get stuck, Only option is Alt+Ctrl+Del and then force shut down of eMClient 10. This also happen with another error message. It seem like with new update Reminder is always poping up and covers all other messages.