First, have you looked under your Project's folder, for the AutoSave files? Note: AutoSave files are FIFO, so the last (probably #5, unless you changed the default), might not be the latest. Change your view to details, and check the Dates/Times.
This seems to be a common issue when working with the titler and haven't resolved mine yet either. (posted here but won't let me insert link)
The autosaves are your best bet to recover some of your lost work and as Bill says, be sure to use the most recent file.
Thank you Bill, your suggestions helped, and I found it!