QV7 tries to protect your data, so if you delete your data, there are a few back up strategies.
Your Problem is easy to solve, if it is only the "showing" of the DELETED Tag:
Open the XPlorer, click on the little Arrow (Dropdown Menu) right beside the red X. Than deselect "Show hidden objects". Done.
If you realy want to delete all your "deletet" staff, go to databases and select "Compress Database".
In your Windows Explorer in the folder qu5 there is still a backup file with the ending *.bak. If you like, you can also delete this.
PS: It is recommend to ransomly do a Quick Backup (Files, Quick Backup - End)