Excel Desktop Integration - Not Functioning

I was using the excel desktop integration for the Close Schedules in Spreadsheet function in Oracle Procurement and it was working fine. The spreadsheet would download the purchase orders that me the criteria I needed, I would change the status and then could upload them back into Oracle without a problem. Now, however, when I download the spreadsheet and select "Enable Editing", there is no pop-up that instructs me to login and the information never downloads. I have tried using a different browser, using a private browsing window, clearing my cache, uninstalling and re-installing the desktop integration, restarting my computer