Cannot open a recent Project File

This morning I created a simple project file, it contains a four bar loop of four midi tracks all using Groove Agent SE as the .vst. There is a REVerence insert on each channel and some EQ. I saved the project, shut down Cubase and went to run some errands. I came home and the project file is now grayed out. When I double click it, Cubase opens but prompts me for a project to open. I know it’s not a big deal to just start that Project again, I have almost no time in it but I’m kind of concerned that that might happen to a more fully developed track. This is on a late 2014, 27" Retina iMac running 10.11.2 and Cubase 8.5.0 64bit.

Thanks in advance.

Jamie Howton