Please, be informed that FBS does not close any accounts for you to able to restore access to them at any time. If you do not need your account anymore, you can stop using it - it will be archived after 90 days of inactivity.
We would like to remind you that demo accounts for the MetaTrader4 platform are valid for some period (depending on the account type), and after that, they are being deleted automatically.
from the MT4 platform
In this case, we may recommend you to open a new demo account.
Demo accounts for MetaTrader5 platform can be archived/deleted in a period set at the discretion of the company.