Proclaim on MAC - delete stuff?

So, I can't figure out a way to delete slides on Proclaim through the MAC.

Example: on my old PC, let's say I had three "song" slides, and I wanted to remove one. I would highlight it, hit the "delete" key (not the "backspace" key), and boom, it was gone.

On the MAC, nothing I do will delete that slide. Not even highlighting it and clicking "edit." When I do that, the delete option isn't even available to me. I've tried every combination of the "delete" key and "command," "control," "alt," etc.

Help?

By the way, other than this one issue, I have NO problems with this program. It's AWESOME. It's totally revamped the way we do lyrics. I have my female vocalist read her lyrics off of the computer and control the lyrics herself, and she's standing right next to me. I can make last minute changes, add/remove/edit a song in the middle of a worship service...it's awesome. Thanks for all your work, you guys really made the stuff that we worship leaders needed happen.