Im posting this here because I forgot it in the past and didn't write it down. If your SQLEXPRESS DB is full and you want to delete entries in the Journal you cannot use Administrator to run your query. You will get an error.
Use SQL Server Management Studio Express to run
delete from journal where time < getdate()-365
and it will work.
This usually is a very stressful situation because your register will throw errors until this is fixed and when the query doesn't work it gets more stressful.
Hope this helps someone.
Jason