Yes, Security Monitor Pro has a setting for full screen preview. Click on Tools > Application Settings. Check the box for 'When Windows starts, launch Security Monitor Pro in:' and use the pull down to select 'Full Preview'

Security Monitor Pro can remove old recordings based on a number of days, or when there is below a certain amount of space left on your hard drive. You can set the deletion from the General Settings. Please see this page for an illustration - https://www.deskshare.com/help/smp/general-settings.aspx