Locked-up at "Uploading file to Adobe ExportPDF online...", even after closing, exiting, clearing browser cache, clearing all documents from online library.

Locked-up at "Uploading file to Adobe ExportPDF online...", even after closing, exiting, clearing browser cache, clearing all documents from online library.  Ctrl-Alt-Del EndTask also had no effect.  Upon opening, searches for current status and then locks up...  Any help?