Black and Grey Screens are covering my slides

Hi,

I'm able to open Adobe Captivate, but I'm not able to edit my slides. A black and grey screen is covering the slides and the slides disappear behind it. If I select an element from any of the slides. The slide disappears. I closed and re-opened Adobe Captivate. I opened a new project and copy and pasted the slides, but it seems like that this is a problem across the whole program.

I hope somebody can help me. This is very frustrating as it holds me back from finishing a project for a client.