Using higher sample rates on the Eclipse will disable some Programs, it sounds like your unit is set to use a higher sample rate. Go to Setup > Dig-In > Clock to change this to 44.1kHz or 48kHz and that should allow you to add an additional algorithm.
More information can be found on page 25 of the user guide: https://s3.amazonaws.com/com.eventide.downloads/Product+Manuals/EclipseUserManual.pdf
