I am trying to work on an Excel document. I have been able to edit it in the past and can edit other Excel documents with no issues. This one (which I downloaded, worked on my laptop and re-uploaded the new version) will not let me edit it. That defeats the purpose. How can I correct this? It loads with the active taskbar, then shuts it off, and I cannot edit it. I don't see a way to attach a file here but I can edit other documents that open in Excel for windows/web so why not this one???