You open up your precious Xcelsius dashboard only to have it crash on startup.. The good news is you are not doomed.. If you are like me and run a lot of programs at once and have frequent crashes, it is plausable for your Excel file to go corrupt.
The fix is actually pretty simple. You will crack open the XLF file, open the source Excel, let Excel repair itself, re-save, and then inject it back into your XLF.
I put together a post on SAP Community Network with detailed step by step directions.